Rockford Fosgate Stereo Amplifier 2501 User Guide

250.1

power

250.2

c a r a u d i o_for

power

f a n a t i c s

competition Power amplifiers

Operation & Installation

new

chrome

heatsink

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TABLE O F

O N TEN TS

Introduction................................................................................................................................................................. 1

Punch Accessory Pack ................................................................................................................................................. 1

Technical Design Features............................................................................................................................................. 2

250.2 Design Features ................................................................................................................................................. 5

250.1 Design Features ................................................................................................................................................. 7

Installation Considerations ............................................................................................................................................ 9

Mounting Locations.................................................................................................................................................... 10

Battery and Charging ................................................................................................................................................. 10

Wiring the System ...................................................................................................................................................... 11

Using Passive Crossovers ............................................................................................................................................ 12

Table of Crossover Components ................................................................................................................................... 13

Using the XCard ......................................................................................................................................................... 14

Customizing the XCard ............................................................................................................................................... 14

XCard Resistor Chart................................................................................................................................................... 15

250.2 Installation ...................................................................................................................................................... 16

Using the 250.2 Internal Switching Network .................................................................................................................. 19

Using the 250.2 Balanced Line Inputs .......................................................................................................................... 24

250.1 Installation ...................................................................................................................................................... 26

Using the 250.1 Internal Switching Network .................................................................................................................. 31

System Diagrams....................................................................................................................................................... 34

Rockford Fosgate Accessories ...................................................................................................................................... 38

Troubleshooting ......................................................................................................................................................... 40

Autosound 2000’s Quick Check for Troubleshooting....................................................................................................... 43

250.2 Specifications ................................................................................................................................................... 46

250.1 Specifications .................................................................................................................................................. 47

Warranty Information ................................................................................................................................................. 48

International Information ............................................................................................................................................. 49

E T T I N G

T A R T E D

Welcome to Rockford Fosgate! This manual is designed to provide information for the owner, salesperson and installer. For

those of you who want quick information on how to install this product please turn to the Installation section of this manual

or refer to the icons listed below. Other information can be located by using the Table of Contents. We, at Rockford Fosgate,

have worked very hard to make sure all the information in this manual is current. But, as we are constantly finding new ways

to improve our product, this information is subject to change without notice.

TROUBLE-

Sections marked

ADVANCED

OPERATION

include in-depth

technical information

Sections marked

INSTALLATION

include “slam dunk”

wiring connections

Sections marked

TROUBLESHOOTING

include recommendations

for curing installation

problems

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INTRODUCTION TO 250 SERIES

The “250 Series” Power amplifiers represent the best Rockford Fosgate has to offer! Our engineers devised technical features

which would be considered overkill by other audio manufacturers, but not at Rockford Fosgate! Trans•nova, DIAMOND and

TOPAZ, exclusively designed by Rockford, are just a few of these features which are described in the Technical Design

Features section of this manual.

The 250.2 is a two-channel amplifier

which is optimized to drive 2

Ω stereo and 4Ω bridged loads.

The 250.1 is a single

channel amplifier optimized to drive a 2

Ω (single amp) or a 4Ω bridged load (pair of amps bridged to a single load).

The “250 series” use Rockford's innovative technologies for awesome sound quality, reliable performance and high output

power into low impedances. This can be beneficial for serious competition vehicles.

UNCH AMPLIFIER ACCESSO RY

ACK

The accessory pack shipped with the “250 series” Power amplifiers include the mounting hardware necessary to secure

the ampliifer to the vehicle and to attach the end caps to the amplifier.

Punch Power 250.2

Punch Power 250.1

Installation & Operation Manual

Punch Verification Certificate

(4) Amplifier mounting screws (#8 x ³⁄4" phillips)

(8) Speaker & power connector screws (3/32" allen)

(4) End cap mounting screws (9/64" allen)

(1) Allen wrench 3/32"

(4) Amplifier mounting screws (#8 x ³⁄4" phillips)

(6) Speaker & power connector screws (3/32" allen)

(4) End cap mounting screws (9/64" allen)

(1) Allen wrench 3/32"

(1) Allen wrench 9/64"

– 1 –

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TECH NICAL

ESIGN FEATURES

Many of the solutions to common design problems encountered by Rockford Fosgate engineers created entire new circuit

designs as well as newwaysto constructthe Punch250.2 and 250.1 Power Amplifiers. In our flagship amplifiers, noexpense

was spared in design and construction from the unique circuitry design to the manufacturing process that has proven to be

the industry reference for many years. Described below are just some of the accomplishments achieved by our engineering

and manufacturing staff.

◆ trans•nova (TRANSconductance NOdal Voltage Amplifier)

The trans•nova (TRANS conductance NOdal Voltage Amplifier) is a patented circuit (U.S. Patent 4,467,288) that allows

the audio signal to pass through the amplifier at low voltage. Each amplifier channel utilizes its own “fully floating” power

supply and is configured to increase power gain. The increase in power gain allows the drive stage to operate at a lower

voltage. A low voltage drive stage is the same principle used in high quality preamplifiers to produce high linearity and wide

bandwidth.

E-I

I-E

trans•nova circuitry

The resulting design utilizes an output stage with a simpler gain structure and a shorter total signal path than conventional

high voltage (bi-polar) designs. The number of stages is reduced from five or more to three. The output stage is further refined

into a trans-impedance stage (current to voltage converter) to achieve a short loop (fast) negative feedback. The output stage

is driven cooperatively by a transconductance stage (voltage to current converter).

THE RESULT: Superior sound quality, greater efficiency and higher reliability.

◆ DIAMOND (Dynamically Invariant AMPlification Optimized Nodal Drive)

DIAMOND (Dynamically Invariant AMplification Optimized Nodal Drive - patent pending) is an important advance in circuit

design which reduces high frequency distortion. Amplifiers which utilize a large array of output MOSFETs cause a high

capacitive load on the driver stage. This load can make the high frequencies sound harsh. The DIAMOND circuit eliminates

highfrequencydistortionbyallowingthedrivertooperatewith20dBormoreofcurrentheadroom, whereastraditionaldrivers

have only 6dB of current headroom.

THE RESULT: Lower distortion and greater inherent stability.

◆ TOPAZ (Tracking Operation Pre-Amplifier Zone)

The TOPAZ (Tracking Operation Pre-Amplifier Zone) circuitry solves ground loop noise problems common to automotive

amplifier design. This innovative new development allows vastly improved isolation of the input signal grounds from the

power supply ground of the amplifier. This is accomplished by allowing the source unit to control the potential “environment”

of the entire input structure or “zone” of the amplifier. This process improves the noise rejection of the amplifier by 30-40dB

– an astounding 20-100 times better than amplifiers without TOPAZ.

THE RESULT: Elimination of troublesome ground loop noise between source and amplifier.

– 2 –

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◆ DSM (Discrete Surface Mount Technology)

The DSM (Discrete Surface Mount) manufacturing process combines the advantages of both discrete components and

integrated circuitry. Rockford Fosgate is the only American amplifier manufacturer to have invested millions into this process.

DSM components differ from conventional discrete components in different ways. They are more compact, more rugged,

andtheyefficientlydissipategeneratedheat. Usingthemwhereverappropriateallowstheadvantagesassociatedwithdiscrete

circuitry to be retained while also providing room for both highly advanced processing features and generous PC board

copper paths where needed. Their short lead-out structures allow maximum audio performance and highest signal-to-noise

ratios to be obtained in amplifiers of desirable package size without resorting to “amplifier-on-a-chip” shortcuts. These

advantages are shown below in Figure 1.

Component

Figure 1

Solder

PC Board

Thru-Hole

Surface Mount

THE RESULT: Less connections, improved reliability, shorter signal paths, superior signal-to-noise ratio and awesome sonic

performance.

◆ XCard (Internal Crossover)

The Power amplifiers utilize internal active crossovers. These crossovers have many performance advantages such as using

discrete components for exact frequency adjustments which are far superior to potentiometers. Additionally, the XCard can

be configured for high-pass, low-pass and full range operation. With slight modification, many crossover frequencies and

slope configurations can be achieved.

THE RESULT: Increased system design flexibility with a precise electronic crossover without the limitations of conventional

potentiometer designs.

◆ Stereo Pass-Thru

The Pass-Thru output provides a convenient source for daisy-chaining an additional amplifier without the need for extra RCA

cables or “Y” adapters. The 250.1 Pass-Thru provides constant Full Range stereo output. The 250.2 has the ability to provide

constant Full Range stereo output as well as distribute one of its internal XCards to the Pass-Thru for a dedicated High-Pass

or Low-Pass output.

THE RESULT: Convenient signal level output for adding extra amplifiers.

– 3 –

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◆ Balanced Line Inputs (250.2)

Using the Balanced Line Inputs provides the last word in achiev-

able rejection of noise induced in the cable between the source

and the amplifier. The differential input circuitry (Figure 2) used

in the balanced input system rejects whatever signals are

common to both of the shielded, twisted-pair conductors. Bal-

anced line is universal in concert installations where the stage

and mixing consoles are hundreds of feet apart. Long signal

cables and electrically-noisy environments make signal integrity

and noise rejection an extremely difficult challenge.

Figure 2

Center

RCA Input

Differential

Input

Conductor

Outer

Shield

Differential inputs only amplify the difference between two conductors.

Note: the noise spikes appear on both the center conductor and the outer

shield and therefore are not amplified.

THE RESULT: Quiet transmission of audio from source to amplifier.

◆ NOMAD (NOn-Multiplying Advanced Decision)

The Power amplifiers use an analog computer process to absolutely maximize safe output power under all operating

conditions. The innovative NOMAD (NOn-Multiplying Advanced Decision) system is the most sophisticated version of this

technique ever used, bringing previously unavailable levels of accuracy, stability, temperature immunity and reliability to

this critical process. NOMAD makes advanced decisions based on device voltages to precisely control the awesome levels

of current available in the output MOSFETs to safe values – but only when absolutely needed.

THE RESULT: Extremely fast protection system that always protects the amplifier and never degrades the sound.

◆ MOSFET Devices (Metal Oxide Semiconductor Field Effect Transistor)

RockfordFosgateisoneofthefewmanufacturersinanyofthesoundcommunitiestoutilizeMOSFETdevicesinboththepower

supply and the output stages. MOSFET (Metal Oxide Semiconductor Field Effect Transistor) devices offer several important

inherent advantages over the 30 year old technology of bi-polar design. These advantages include: thermal stability,

switching speed, ultra low output impedance and wider bandwidth linearity. In addition, MOSFET and vacuum tubes share

many important operating characteristics. However, the MOSFET device is much faster, wider in bandwidth, measurably

lower in distortion and far more linear than vacuum tubes.

THE RESULT: Operational characteristics of vacuum tubes without the performance limitations of tube design.

◆ ITS (Increased Thermal Stability)

The ITS (Increased Thermal Stability) Power Supply design is new in Rockford Fosgate amplifiers. A major problem

associated with any amplifier design is how to get rid of the heat generated by its circuitry. Clearly, it is highly desirable to

minimize the amount of heat generated in the first place. The “250 series” Power amplifiers employ a new toroidal power

transformer design in which the high current input leads are carried directly to the switching power MOSFETs. This both

minimizes PC board heating and takes advantage of natural air cooling of these leads.

THE RESULT: Maximizes power supply efficiency by eliminating unnecessary heat generation.

– 4 –

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250.2 D ESI G N FEAT U RES

1. Cast Aluminum Chrome Heatsink – The cast aluminum heatsink of the Punch Power amplifier dissipates heat

generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% improvement of cooling over

conventional extrusion heatsink designs.

2. End Caps – The unique end caps conceal the wiring and input cables, giving the amplifier a clean “stealth” look.

Unbal.

L (Mono)

Bal.

Speaker

0°-180°

EZ - 180° - 0°

Bridged

Speaker

–

Bal.

Input

Pass-

Thru

Gain

Power

REM

Dual GND

Dual B+

3. Speaker Terminals – The heavy duty, gold-plated terminal block connectors (+ and –) will accept wire sizes from

8 AWG to 18 AWG. These gold-plated connectors are immune to corrosion that can cause signal deterioration.

4. Power Terminals – The dual power and ground connectors on the Punch Power amplifier are gold-plated and will

accommodate up to two 8 AWG wires maximizing the input current capability of the amplifier.

5. REM Terminal – This gold-plated spade terminal is used for the AP (auto power) or remote turn on of the Punch 250.2

Power amplifier.

6. RCA Input Jacks – The industry standard RCA jack provides an easy connection for signal level input. They are gold-

plated to resist the signal degradation caused by corrosion.

7. Balanced Line Input– This input will allow the balanced inputs to be used in conjunction with the Punch 250.2 Power

amplifier to provide better noise rejection.

8. Signal Input Switch – This switch allows selection of either the RCA or Balanced Line inputs.

9. RCA Pass-Thru Jacks – The Pass-Thru provides a convenient source for daisychaining an additional amplifier. This

eliminates the need for additional RCA cables or “Y” adapters. One of the internal crossovers can be designated to

the Pass Thru output creating a dedicated low-pass, high-pass, or full range output.

– 5 –

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10. Input Sensitivity Controls – The input level controls are preset to match the output of most source units. They can be

adjusted to match output levels from a variety of source units.

11. Internal Crossovers – These built-in crossover cards are configurable for a multitude of operating frequencies. The

orientation of the card in its socket determines its function of high-pass, low-pass or full range operation.

12. E-Z Bridge Switch / 0°-180°Phase Switch – This dual purpose switch enables you to E-Z bridge the amplifier or invert

the signal phase of the right channel.

13. Phase Switch – This switch enables you to easily invert the phase of the left channel without having to disconnect the

speaker wires.

14. Crossover Switching – These internal switches allow the crossover to be distributed to the amplifier and Pass-Thru

in many different configurations.

15. Audiophile Bypass –Oneofthecrossoverswitchingconfigurationsallowstheinternalcrossovercircuittobebypassed,

maintaining Audiophile sound quality due to a shorter signal path.

16. LED Power Indicator – The LED gives a visual indication of the status of the amplifier, lighting when the unit is turned on.

– 6 –

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250.1 D ESI G N FEATU RES

1. Cast Aluminum Chrome Heatsink – The cast aluminum heatsink of the Punch Power amplifier dissipates heat

generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% improvement of cooling over

conventional extrusion heatsink designs.

2. End Caps – The unique end caps conceal the wiring and input cables, giving the amplifier a clean “stealth” look.

L (Mono)

Power

0°-180°

X-Over

24dB/12dB/0dB

Gain

Speaker

–

L + R / L

(Mono)

L Pass-Thru R Pass-Thru

REM

Dual GND

Dual B+

3. Speaker Terminals – The heavy duty, gold-plated terminal block connectors (+ and –) will accept wire sizes from

8 AWG to 18 AWG. These gold-plated connectors are immune to corrosion that can cause signal deterioration.

4. Power Terminals – The dual power and ground connectors on the Punch Power amplifier are gold-plated and will

accommodate up to two 8 AWG wires maximizing the input current capability of the amplifier.

5. REM Terminal – This gold-plated spade terminal is used for the AP (auto power) or remote turn on of the Punch 250.1

Power amplifier.

6. RCA Input Jacks – The industry standard RCA jack provides an easy connection for signal level input. They are gold-

plated to resist the signal degradation caused by corrosion.

7. Summed Stereo / Mono Switch – This switch is used to select whether 1 or 2 signal inputs will be used to drive the

amplifier.

8. Pass-Thru RCA Jacks – The Pass-Thru provides a convenient source for daisychaining an additional amplifier.This

eliminates the need for additional RCA cables or “Y” adapters. The Pass-Thru output is Full Range only.

9. Input Sensitivity Control – The input level control is preset to match the output of most source units. It can be adjusted

to match output levels from a variety of source units.

– 7 –

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10. Internal Crossover – This built-in crossover card is configurable for a multitude of operating frequencies. The

orientation of the card in its socket determines the function of high-pass, low-pass or full range operation.

11. Phase Switch – This switch enables you to easily invert the phase without having to disconnect the speaker wires.

12. Crossover Switch – This multi-function switch enables you to select a 12dB per octave slope or 24dB per octave

slope for the internal crossover. When switched to 0dB, the internal crossover circuit can be bypassed, maintaining

Audiophile sound quality due to a shorter signal path.

13. LED Power Indicator – The LED illuminates when the unit is turned on.

– 8 –

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N STALLATI O N

O N SI D ERATI O N S

Tools Needed

The following is a list of tools you will need for installing the “250 Series” Power amplifiers:

Allen wrenches 9/64" & 3/32" (included)

Wire strippers

Wire Cutters

Voltmeter

Battery post wrench

Wire crimpers

Assorted connectors

Electric hand drill and assorted bits

This section focuses on some of the vehicle considerations for installing your new Punch amplifier. Checking your battery

and present sound system, as well as pre-planning your system layout and best wiring routes will save installation time.

When deciding on the layout of your new system, be sure that each component will be easily accessible for making

adjustments.

Before beginning any installation, be sure to follow these simple rules:

1. Carefully read and understand the instructions before attempting to install the amplifier.

2. For safety, disconnect the negative lead from the battery prior to beginning the installation.

3. For easier assembly, we suggest you run all wires prior to mounting your amplifier in place.

4. Route all of the RCA cables close together and away from any high current wires.

5. Use high quality Connecting Punch accessories for a reliable installation and to minimize signal or power loss.

6. Think before you drill! Be careful not to cut or drill into gas tanks, fuel lines, brake or hydraulic lines, vacuum

lines or electrical wiring when working on any vehicle.

7. Never run wires underneath the vehicle. Running the wires inside the vehicle provides for best protection.

8. Avoid running wires over or through sharp edges. Use rubber or plastic grommets to protect any wires routed

through metal, especially the firewall.

9. ALWAYS protect the battery and electrical system from damage with proper fusing. Install a fuseholder and fuse

on the +12V power wire within 18" (45.7cm) of the battery terminal.

10. When grounding to the chassis of the vehicle, scrape all paint from the metal to ensure a good, clean ground

connection. Grounding connections should be as short as possible and always be connected to metal that is

welded to the main body, or chassis, of the vehicle.

– 9 –

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OUNTING LOCATION S

The mounting location and position of your amplifier will have a great effect on its ability to dissipate the heat generated

under normal operation. The design of our cast aluminum heatsink serves to easily dissipate the heat generated over a wide

range of operating conditions. However, to maximize the performance of your amplifier, care should be taken to ensure

adequate ventilation.

Trunk Mounting

Mounting the amplifier vertically on a surface with the fin grooves running up and down will provide the best cooling of the

amplifier.

Mounting the amplifier on the floor of the trunk will work but provides less cooling capability than vertical mounting.

Mounting the amplifier upside down to the rear deck of the trunk will not provide proper cooling and will severely affect the

performance of the amplifier and is strongly not recommended.

Passenger Compartment Mounting

Mounting the amplifier in the passenger compartment will work as long as you provide a sufficient amount of air for the

amplifier to cool itself. If you are going to mount the amplifier under the seat of the vehicle, you must have at least 1"

(2.54cm) of air gap around the amplifier's heatsink.

Mounting the amplifier with less than 1" (2.54cm) of air gap around the heatsink in the passenger compartment will not

provide proper cooling and will severely affect the performance of the amplifier and is strongly not recommended.

Engine Compartment Mounting

Rockford Fosgate amplifiers should never be mounted in the engine compartment. Not only will this void your warranty

but could create an embarrassing situation caused by the ridicule from your friends.

BATTERY AND

H ARGING

Amplifiers will put an increased load on the vehicle's battery and charging system. We recommend checking your alternator

and battery condition to ensure that the electrical system has enough capacity to handle the increased load of your stereo

system. Stockelectricalsystemswhichareingoodconditionshouldbeableto handletheextra loadofanyRockfordamplifier

without problems, althoughbattery and alternator life can be reduced slightly. To maximize the performance of your Rockford

Fosgate amplifier, we suggest the use of a heavy duty battery and an energy storage capacitor.

NOTE: These amplifiers utilize a large array of power supply capacitance and can draw substantial current at turn-

on. The dashboard BATTERY VOLTAGE and/or ALTERNATOR CHARGE lamp may illuminate for a brief period while

momentarily recharging the capacitor bank. This may be most noticeable when the amplifier is off for at least a day

or two and is considered normal operation.

– 10 –

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I RI N G

H E SYST EM

CAUTION: Avoid running power wires near the low level input cables, antenna, power leads, sensitive equipment or

harnesses. The power wires carry substantial current and could induce noise into the audio system.

1. Configure the internal XCard crossovers prior to installation. Refer to the “Using the Signal Switching Network” (page

19 for the 250.2 and page 31 for 250.1) for further information.

2. Plan the wire routing. Take care when running signal level RCA cables to keep them close together but isolated from

the amplifier's power cables and any high power auto accessories, especially electric motors. This is done to prevent

coupling the noise from radiated electrical fields into the audio signal. When feeding the wires through the firewall or

any metal barrier, protect them with plastic or rubber grommets to prevent short circuits. Leave the wires long at this

point to adjust for a precise fit at a later time.

3. Prepare the Power cable for attachment to the amplifier by stripping 5/8"

INSULATION

STRIP WIRE

of insulation from the end of the wire. The use of 8 gauge power cable can

interfere with the installation of the end caps. Proper wire dress can prevent

this from occurring. To prevent the wire from fraying, strip the insulation at

a 45° angle. Insert the bared wire into the B+ terminal with the long side

of the insulation on the top. Bend the cable down at a 90° angle. Tighten

the set screw to secure the cable in place. We recommend using (2) 8

gauge cables for power and for ground. This will give you the best

performance possible.

5/8"

AMP

4. Strip 3/8" from the battery end of the power cable and crimp a large ring terminal to the cable. Use the ring terminal

to connect to the battery positive terminal. Do not install the fuse at this time.

5. Prepare a length of cable to be used for the ground connection. Strip 5/8" of insulation from the end of the cable as

described above and connect to the appropriate terminal of the amplifier. Prepare the chassis ground by scraping any

paint from the metal surface and thoroughly clean the area of all dirt and grease. Strip the other end of the wire and attach

a ring connector. Fasten the cable to the chassis using a non-anodized screw and a star washer.

6. Prepare the REM turn-on wire for connection to the amplifier by stripping 1/4" of insulation from the wire end and

crimping an insulated spade connector in place. Slide the connector over the REM terminal on the amplifier. Connect

the other end of the REM wire to a switched 12 volt positive source. The switched signal is usually taken from the source

unit's auto antenna or the accessory lead. If the source unit does not have these outputs available, the recommended

solution is to wire a mechanical switch in line with a 12 volt source to activate the amplifier.

7. Securely mount the amplifier (with supplied screws) to the vehicle or amp rack. Be careful not to mount the amplifier

on cardboard or plastic panels. Doing so may enable the screws to pull out from the panel due to road vibrations or

sudden vehicle stops.

8. Connect the source signal to the amplifier by plugging the RCA cables into the input jack(s) at the amplifier. If using

Balanced Line Inputs, refer to page 24.

9. Connect the speakers. Strip the speaker wires 5/8" and insert into the appropriate terminal on the amplifier. Insert the

bared wire into the speaker terminal and tighten the set screw to secure into place. Be sure to maintain proper speaker

polarity. DO NOT chassis ground any of the speaker leads as unstable operation may result.

– 11 –

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10. Perform a final check of the completed system wiring to ensure that all connections are accurate. Check all power and

ground connections for frayed wires and loose connections which could cause problems from road vibrations.

11. After the final inspection is complete, install the power fuse and enjoy listening. During the initial listening period, you

may need to “fine tune” any phasing and level settings within your particular vehicle. To aid in this procedure, play a

track with high musical content and cruise around your neighborhood. After fully evaluating the transient response of

your system and making any final adjustments, all your neighbors within a 1 mile radius will assume that you have

just successfully completed another upgrade to your audio system for which they will probably spill thumbtacks on your

driveway.

NOTICE!

Amplifiers using the trans• nova topology improve in sound quality after

warming up. We recommend operating the 250.2 and 250.1 for approximately

15 minutes prior to evaluation under judging criteria or tune-ups to establish its

normal operating temperature.

* Your friends will call it MAGIC, you can call it Rockford technology! *

USING PASSIVE CROSSOVERS

A passive crossover is a circuit that uses capacitors and/or coils and is placed on speaker leads between the amplifier and

speaker. The crossover delegates a specific range of frequencies to the speaker for optimum driver performance. A crossover

network can perform one of three functions: High-Pass (capacitors), Low-Pass (inductors or coils) and Bandpass

(combination of capacitor and coil).

The most commonly used passive crossover networks are 6dB/octave systems. These are easy to construct and require one

component per filter. Placing this filter in series with the circuit will reduce power to the speaker by 6dB/octave above or

below the crossover point depending on whether it is a high-pass or low-pass filter. More complex systems such as 12dB/

octave or 18dB/octave can cause impedance problems if not professionally designed.

Passive crossovers are directly dependent upon the speaker's impedance and component value for accuracy. When passive

crossover components are used in multiple speaker systems, the crossover's effect on the overall impedance should be taken

into consideration along with the speaker's impedance when determining amplifier loads.

– 12 –

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TABLE OF CROSSOVER COMPONENT VALUES

6dB/Octave High-Pass

6dB/Octave Low-Pass

Freq.

Hertz

Speaker Impedance

2 OHMS

8 OHMS

4 OHMS

100

130

4.1mH

3.1mH

2.4mH

1000µF

800µF

600µF

8.2mH

6.2mH

4.7mH

500µF

400µF

300µF

16mH

12mH

10mH

250µF

200µF

150µF

200

260

400

1.6mH

1.2mH

.8mH

400µF

300µF

200µF

3.3mH

2.4mH

1.6mH

200µF

150µF

100µF

6.8mH

4.7mH

3.3mH

100µF

75µF

50µF

600

800

1000

.5mH

.41mH

.31mH

136µF

100µF

78µF

1.0mH

.82mH

.62mH

68µF

50µF

39µF

2.0mH

1.6mH

1.2mH

33µF

26µF

20µF

1200

1800

4000

.25mH

.16mH

.08mH

66µF

44µF

20µF

.51mH

.33mH

.16mH

33µF

22µF

10µF

1.0mH

.68mH

.33mH

16µF

10µF

5µF

6000

9000

12000

51µH

34µH

25µH

14µF

9.5µF

6.6µF

.10mH

68µH

51µH

6.8µF

4.7µF

3.3µF

.20mH

.15mH

100µH

3.3µF

2.2µF

1.6µF

6dB/Octave High-Pass and Low-Pass Filters

L = Low-Pass (Inductor)

C = High-Pass (Capacitor)

For more information, see your Authorized Rockford Fosgate Dealer.

– 13 –

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SI N G T H E XCARD

The crossover functions are controlled through the use of an XCard and can be set for high-pass, low-pass or full range

operation. The XCard shipped with your amplifier is set for Full Range. Each crossover card has two faces: one face operates

Full Range, the other has arrows to indicate the edge for selecting HP (high-pass) or LP (low-pass) operation. Orient the

card with the desired operating edge, indicated by the arrow, toward the socket terminals inside the amplifier. Firmly, but

carefully, plug the card into the socket.

High-Pa ss

Low-Pa ss

Full Range

H P

L P

FULL ↕

U STO M IZIN G TH E XCARD

The crossover point can be altered by changing the 4 resistor values. Use the following formula to select the appropriate

resistor value to be placed on the XCard.

3386

The actual formula is: R =

= R (in kΩ) for .047mf cap

2πf c

Where: R = Ω

f = desired crossover frequency

7234

= R (in kΩ) for .022mf cap

c = capacitor in farads

-6

ex: .047 x 10 for .047mf cap

Crossover Card

High Pass

FULL

Low Pass

Full Range

– 14 –

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XCARD RESISTOR

H ART

Ourtestshaveshownthatusing0.047µfcapacitorsforfrequenciesbelow100Hz, and0.022mfcapacitorsforfrequencies

above 100Hz, result in more linear crossover control. Refer to the Specifications page to determine the capacitor value

of each supplied XCard.

Butterworth Alignment Q = .707

1% resistors used with 0.047mF capacitors

1% resistors used with 0.022mF capacitors

Frequency

20Hz

Frequency

20Hz

357kΩ

287kΩ

237kΩ

205kΩ

178kΩ

162kΩ

143kΩ

130kΩ

121kΩ

110kΩ

102kΩ

95.3kΩ

90.9kΩ

84.5kΩ

80.6kΩ

35.7kΩ

23.7kΩ

17.8kΩ

14.3kΩ

12.1kΩ

10.2kΩ

9.9kΩ

357kΩ

287kΩ

237kΩ

205kΩ

178kΩ

162kΩ

143kΩ

130kΩ

121kΩ

110kΩ

102kΩ

95.3kΩ

90.9kΩ

84.5kΩ

80.6kΩ

35.7kΩ

23.7kΩ

17.8kΩ

14.3kΩ

12.1kΩ

10.2kΩ

9.9kΩ

169kΩ

133kΩ

110kΩ

95.3kΩ

84.5kΩ

75kΩ

169kΩ

133kΩ

110kΩ

95.3kΩ

84.5kΩ

75kΩ

25Hz

30Hz

35Hz

40Hz

45Hz

40Hz

45Hz

50Hz

55Hz

60Hz

65Hz

70Hz

75Hz

80Hz

85Hz

90Hz

200Hz

300Hz

400Hz

500Hz

600Hz

700Hz

800Hz

900Hz

1.0kHz

1.2kHz

2kHz

68.1kΩ

61.9kΩ

56.2kΩ

52.3kΩ

48.7kΩ

45.3kΩ

42.2kΩ

40.2kΩ

37.4kΩ

16.9kΩ

11.3kΩ

8.45kΩ

6.65kΩ

5.62kΩ

4.75kΩ

4.22kΩ

3.74kΩ

3.40kΩ

2.80kΩ

1.69kΩ

1.10kΩ

845Ω

68.1kΩ

61.9kΩ

56.2kΩ

52.3kΩ

48.7kΩ

45.3kΩ

42.2kΩ

40.2kΩ

37.4kΩ

16.9kΩ

11.3kΩ

8.45kΩ

6.65kΩ

5.62kΩ

4.75kΩ

4.22kΩ

3.74kΩ

3.40kΩ

2.80kΩ

1.69kΩ

1.10kΩ

845Ω

55Hz

60Hz

65Hz

70Hz

75Hz

80Hz

85Hz

90Hz

200Hz

300Hz

400Hz

500Hz

600Hz

700Hz

800Hz

900Hz

1.0kHz

1.2kHz

2.0kHz

3.0kHz

4.0kHz

5.0kHz

6.0kHz

7.0kHz

8.0kHz

86kΩ

7.15kΩ

6.04kΩ

3.57kΩ

2.37kΩ

1.76kΩ

1.43kΩ

1.21kΩ

10.2kΩ

909Ω

7.15kΩ

6.04kΩ

3.57kΩ

2.37kΩ

1.76kΩ

1.43kΩ

1.21kΩ

10.2kΩ

909Ω

3kHz

4kHz

5kHz

665Ω

6kHz

562Ω

7kHz

487Ω

8kHz

422Ω

– 15 –

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250.2 INSTALLATION

250.2 Power Connections (Option #1)

Power

REM

Dual B+

Dual GND

Connect to remote

turn-on lead of

source unit.

Connect to chassis

ground of vehicle*

Less than 18"

–

Connect to B+ of battery

with a 60 amp fuse.

*Keep wire as short as possible.

250.2 Power Connections (Option #2)

Power

REM

Dual B+

Dual GND

Connect to remote

turn-on lead of

source unit.

Connect to chassis

ground of vehicle*

Less than 18"

Optional energy

storage capacitor

–

Connect to B+ of battery

with a 60 amp fuse.

*Keep wire as short as possible.

– 16 –

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Stereo Operation

RCA

Input

Unbal.

L (Mono)

EZ-1 8 0 °-0 °

Speaker

^0°-180°

Bal.

Input

–

Bridged

Pass

Thru

Gain

–

2Ω Min.

•

RCA inputs are connected to both left and right channels

Signal Input Switch selected to Unbalanced for RCA input

Left Phase Switch set to 0°

Right Phase Switch set to 0°

Gain for left and right channels operate independently

Impedance for each channel should be 2Ω minimum

XCard can be High-Pass, Low-Pass or Full Range position

Stereo/Mono Operation

RCA

Input

Unbal.

L (Mono)

EZ-1 8 0 °-0 °

Speaker

L –

Speaker

0°^-180°

Bal.

Input

–

Bridged

Pass

Thru

Gain

–

2Ω min.

–

Speaker

Terminal

Speaker

Terminal

–

4Ω min.

•

RCA inputs are connected to both left and right channels

Signal Input Switch selected to Unbalanced for RCA input

Left Phase Switch set to 0°

Right Phase Switch set to 180° for stereo/mono operation

All speaker polarity on right channel is inverted to correct for signal phase

Gain for left and right channels set equally to balance the subwoofer

Impedance for each channel should be 2Ω minimum

Impedance for bridged channel should be 4Ω minimum

XCard is in Full Range position

Passive crossovers are needed for proper stereo/mono operation

– 17 –

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Bridged Operation

RCA Input

Unbal.

L (Mono)

EZ-1 8 0 °-0 °

Speaker

^0°-180°

Bal.

Input

–

Bridged

Pass

Thru

Gain

–

Speaker

Terminal

Speaker

Terminal

–

4Ω min.

•

RCA inputs are connected to both left and right channels

Signal Input Switch selected to Unbalanced for RCA input

Left Phase Switch set to 0°

Right Phase Switch set to 180°

Inverting the right signal will allow the bridged woofer to operate correctly

Gain for left and right channels set equally to balance the subwoofer

Impedance for bridged channel should be 4Ω minimum

XCard is in High-Pass, Low-Pass or Full Range position

EZ-Bridged Operation

Mono

Input

Unbal.

L (Mono)

EZ-1 8 0 °-0

Bridged

Speaker

^0°-180°

Bal.

Input

–

Pass

Thru

Gain

–

Speaker

Terminal

Speaker

Terminal

–

4Ω min.

•

RCA input is connected to L (Mono) input

Signal Input Switch to Unbalanced for RCA input

Left Phase Switch at 0°

Right Phase Switch set to E-Z Bridge for the following to occur:

L (Mono) RCA input to drive both the left and right channels

Left Gain will control both the left and right channels

Right Phase will be inverted 180° which will allow the bridged woofer to operate

correctly

•

Impedance for bridged channel should be 4Ω minimum

XCard is in the High-Pass, Low-Pass or Full Range position

– 18 –

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SI N G T H E 250.2 SIGNAL SW I T C H I N G

ET W O RK

The Punch 250.2 Power amplifier has a crossover switching network which enables you to:

•

“Audiophile Bypass” the 250.2 and Pass-Thru

Configure a 12dB per octave filter for both 250.2 and Pass-Thru

“Audiophile Bypass” the 250.2 and configure a 12dB per octave filter for the Pass-Thru

Configure a 24dB per octave filter for the 250.2 and “Audiophile Bypass” the Pass-Thru

Configure a 12dB per octave bandpass filter for the 250.2 and “Audiophile Bypass” the Pass-Thru

The crossover switching network allows the crossover to be distributed to the amplifier and Pass Thru in many different

configurations. The orientation of both switches configure the distribution pattern to where the crossover signal will

be routed.

250.2

AMPLIFIER

XCard Options

125 Watts X 2 into 4 Ohms

with less than 0.05% THD + N from 20-20kHz

225 Watts X 2 into 2 Ohms

Amplifier

Pass Thru

with less than 0.10% THD + N from 20-20kHz

High-Pass

XCa rd

RO CKFO RD CO RPO RATIO N

MADE IN THE USA

Amplifier

XCa rd

Low-Pass

*Bridging Note: The Punch 250.2 can be

bridged in many configurations. Refer to your

owner's manual to determine which mode will

work best in your system.

Audiophile Bypa ss

Not Used Not Used

XCa rd

Full Range

Audiophile Bypa ss

Not Used Pass Thru

Amp Only

XCa rd

– 19 –

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“Audiophile Bypass” as it affects the output of the 250.2 and Pass-Thru.

XCard not required.

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

P.SCN

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

XCard 1

XCard 2

Unbal.

L (Mono)

EZ-180°-0°

Speaker

^0°-180°

Bal.

Speaker

Bal.

Input

–

Bridged

–

Pass

Thru

Gain

–

Full Range

20kHz

20Hz

–

12dB/Octave Low-Pass

20Hz

80Hz

20kHz

•

250.2 bypasses the circuitry of XCard 1 and XCard 2

Pass-Thru bypasses the circuitry of XCard 1 and XCard 2

•

The 250.2 and Pass-Thru are in Audiophile Bypass mode which maintains signal integrity

resulting in a better sounding amplifier

•

The XCards do not need to be inserted to allow the 250.2 or Pass-Thru to operate

– 20–

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Configure a 12dB per octave filter for both the 250.2 and Pass-Thru.

250x 2

XCard*

Pass Thru

XCard*

XCard 1

XCard 2

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

P.SCN

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

Unbal.

L (Mono)

EZ-180°-0°

Speaker

0°^-180°

Bal.

Speaker

– R +

Bal.

Input

–

Bridged

Pass

Thru

Gain

–

12dB/Octave High-Pass

20kHz

20Hz 80Hz

–

12dB/Octave Low-Pass

20Hz

80Hz

20kHz

•

250.2 uses output from XCard 1

Pass-Thru uses output from XCard 2

– 21 –

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“Audiophile Bypass” the 250.2 and configure a 12dB per octave filter

for the Pass-Thru.

Pass Thru XCard

XCard not required.

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

P.SCN

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

XCard 1

XCard 2

Unbal.

L (Mono)

EZ-180°-0°

Speaker

0°^-180°

Bal.

Speaker

Bal.

Input

–

Bridged

–

Pass

Thru

Gain

–

Full Range

20kHz

20Hz

–

12dB/Octave Low-Pass

20Hz

80Hz

20kHz

•

250.2 bypasses the circuitry of XCard 1

Pass-Thru uses output from XCard 2

The 250.2 is in Audiophile Bypass mode which maintains signal integrity resulting in a better

sounding amplifier

•

XCard 1 does not need to be inserted to allow the 250.2 to operate

– 22 –

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– 23 –

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SING THE 250.2 BALANCED LINE INPUTS

The Balanced Line Inputs can be utilized with the optional Balanced Line Transmitter. Unlike standard RCA cables that use

two wires to carry the audio signal and ground, balanced lines use three. In a balanced line, the output signal and its inverted

replica travel down a pair of wires where the ground connects via the shield. As the amplifier receives the signals, it cancels

out whatever signals are common to both wires. The use of balanced lines helps in preventing radiated noise pickup in the

signal cables and has been proven effective in studio installation where long cable runs and magnetic fields make

maintaining signal integrity difficult.

Connecting the BLT

BALANCED LINE TRANSM ITTER

+18V

–18V

– R. SIG

+ R. SIG

– L. SIG

+ L. SIG

BALANCED LINE

OUTPUT

INPUT

LED

SHIELD

(Mono)

Speaker

Balanced

Input

Gain

Phase

Bass

Speaker

–

^{– 180}°

Balanced

Unbalanced

Pass Thru Pass Thru

EZ Bridged 180°- 0°

•

Signal Input Switch to Balanced for Balance Line Input

Gain for Left and Right channels set to minimum

CAUTION!! You must turn the gain controls to minimum when using the Balanced Line Transmitter. If the input gains

need to be adjusted, this can now be done in the Balanced Line Transmitter.

– 24 –

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Level Setting the BLT

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

P.SCN

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

1kHz Test Tone @ “0dB”

8.0 _VAC

BALANCED LINE TRANSM ITTER

–

•

Disconnect Speaker(s) from the 250.2

CD Software used to set levels is a test tone of 1kHz at “0dB” or “All Bits High”

Source Unit set to 3/4 volume (or maximum unclipped output)

Remove BLT Cover to access test pads and gain pots

AC Voltmeter set to AC Volts

AC Voltmeter “–” connected to RCA shield of BLT

AC Voltmeter “+” connected to test pad inside the BLT

Adjust BLT Gain from 2.5 VRMS min. to 8.0 VRMS max per test pad (see chart below)

Be sure the time index reads greater than 30 seconds on source unit.

Gain Overlap

BLT Output (AC Volts)

Performance Characteristics

+0dB*

2.5 VRMS

Best S/N Ratio, Reduced SPL

(Used for Optimum Sound Quality)

+5dB

4.5 VRMS

Good S/N Ratio & SPL

(Use for Audiophile Listener)

+10dB

8.0 VRMS

Best Compromise between S/N Ratio & SPL

(Used for Average Listener)

*Absence of gain overlap will reduce SPL and may not permit amplifier to reach full output power due to various CD

software.

– 25 –

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250.1 INSTALLATION

250.1 Power Connections (Option #1)

REM

Dual B+

Dual GND

Connect to remote

turn-on lead of

source unit.

Connect to chassis

ground of vehicle*

Less than 18"

–

Connect to B+ of battery

with a 60 amp fuse.

*Keep ground connections as close to each other as possible.

250.1 Power Connections (Option #2)

REM

Dual B+

Dual GND

Connect to remote

turn-on lead of

source unit.

Connect to chassis

ground of vehicle*

Less than 18"

Optional energy

storage capacitor

–

Connect to B+ of battery

with a 60 amp fuse.

*Keep ground connections as close to each other as possible.

– 26 –

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Mono Operation

RCA Input

L (Mono)

Power

X-Over

24dB/12dB/0dB

0°-180°

Speaker

–

Gain

L Pass Thru R Pass Thru

L + R / L (Mono)

RCA Inputs

–

2Ω minimum

•

Signal Input Switch set to L+R for RCA input

Phase Switch set to 0°

Impedance should be 2Ω minimum

XCard can be set for High-Pass, Low-Pass or Full Range

– 27 –

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FluRange

LM(no)

nuim

Ω

Hgih,Low-Pas

ecah

– 28 –

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nuim

Ω

nuim

Ω

LM(no)

180

FluRange

euqaly

brigdchanel

– 29 –

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nuim

Ω

Hih,Lw-PsrouFlRaneg

LR+

180

euqaly

birgdchanel

– 30 –

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S I N G T H E 250.1 SIGNAL

W I T C H I N G

E T W O R K

“Audiophile Bypass” the 250.1

XCard not required.

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

ST LD RDM RPT

P.SCN

LOUD

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

XCard

L (Mono)

Power

X-Over

24dB/12dB/0dB

0°-180°

Speaker

–

Gain

L Pass Thru R Pass Thru

L + R / L (Mono)

RCA Inputs

–

Full Range

20kHz

20Hz

–

20kHz

20Hz

•

Xover is set to 0dB

The 250.1 is in Audiophile Bypass mode which maintains signal integrity resulting in a

better sounding amplifier

•

Pass-Thru has Full Range output only

The XCard does not need to be inserted to allow the 250.1 to operate

– 31 –

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Configure a 12dB per octave filter for the 250.1

AUD

SEL

CLOCK

DSPL

AUTO

ILLUM

DISC

AMFM

ST LD RDM RPT

P.SCN

LOUD

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

XCard

L (Mono)

Power

X-Over

24dB/12dB/0dB

0°-180°

Speaker

–

Gain

L Pass Thru R Pass Thru

L + R / L (Mono)

RCA Inputs

–

12dB/Octave Low-Pass

Full Range

20Hz

20kHz

–

20kHz

20Hz

•

Xover is set to 12dB

Pass-Thru has Full Range output only

– 32 –

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Configure a 24dB per octave filter for the 250.1

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

P.SCN

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

XCard

L (Mono)

Power

X-Over

24dB/12dB/0dB

0°-180°

Speaker

–

Gain

L Pass Thru R Pass Thru

L + R / L (Mono)

RCA Inputs

–

24dB/Octave Low-Pass

Full Range

20kHz

20Hz

–

20kHz

20Hz

•

Xover is set to 24dB

Pass-Thru has Full Range output only

By switching the crossover to 24dB, the signal is routed through the XCard twice

– 33 –

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SYSTEM

I AG RAM S

250 Watt System (rated @ 4 ohms)

Total Power Delivery (RMS)

Tweeters

Midrange

450 Watts

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

P.SCN

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

80Hz HP

250.2

TX-4183

PWR-14X

3kHz-20kHz

18dB/octave HP

PWR-14X

PWR-54

4Ω

80Hz-20kHz

24dB/octave HP

– 34 –

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500 Watt System (rated @ 4 ohms)

Total Power Delivery (RMS)

Tweeters

Midrange

Woofers

450 Watts

500 Watts

AUD

SEL

CLOCK

DSPL

AUTO

DISC

AMFM

P.SCN

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RPT

RDM

DIM

PAUSE

Pass-Thru

80Hz LP

80Hz HP

250.2

TX-4183

PWR-14X

3kHz-20kHz

18dB/octave HP

PWR-54

4Ω

80Hz-20kHz

12dB/octave HP

24dB/octave HP

30Hz HP*

XCard

250.1

30Hz High-Pass used

as a sub-sonic filter.

30Hz-80Hz

4Ω

12dB/octave BP

RFR-1415

• A sub-sonic filter is a high-pass filter that limits the input signal below a certain motion below that frequency. At very low frequencies

a woofer has no output, just motion. If you try to drive this woofer at these lower frequencies, the woofer could self-destruct. Please refer

to the crossover section of the manual or see your local Authorized Rockford Fosgate Dealer for more information.

– 35 –

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750 Watt System (rated @ 4 ohms)

Total Power Delivery (RMS)

Tweeters

Midrange

Midbass

Woofers

450 Watts

250 Watts

500 Watts

AUD

SEL

CLOCK

DSPL

AUT

DISC

P.SCN

RPT

LOUD

AMFM

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RDM

DIM

PAUSE

Pass-Thru

400Hz LP

400Hz HP

250.2

TX-4183

PWR-14X

3kHz-20kHz

18dB/octave HP

PWR-54

4Ω

400Hz-20kHz

12dB/octave HP

Pass-Thru

80Hz LP

80Hz HP

250.2

PWR-64

4Ω

80Hz-400Hz

12dB/octave BP

30Hz HP*

XCard

250.1

30Hz High-Pass used

as a sub-sonic filter.

4Ω

30Hz-80Hz

12dB/octave BP

RFR-1415

• A sub-sonic filter is a high-pass filter that limits the input signal below a certain motion below that frequency. At very low frequencies

a woofer has no output, just motion. If you try to drive this woofer at these lower frequencies, the woofer could self-destruct. Please refer

to the crossover section of the manual or see your local Authorized Rockford Fosgate Dealer for more information.

– 36 –

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1000 Watt System (rated @ 4 ohms)

Total Power Delivery (RMS)

Tweeters

Midrange

Midbass

Woofers

450 Watts

250 Watts

1000 Watts

AUD

SEL

CLOCK

DSPL

AUT

DISC

P.SCN

RPT

LOUD

AMFM

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RDM

DIM

PAUSE

Pass-Thru

400Hz LP

400Hz HP

250.2

TX-4183

PWR-14X

3kHz-20kHz

18dB/octave HP

PWR-54

4Ω

400Hz-20kHz

12dB/octave HP

Pass-Thru

80Hz LP

80Hz HP

250.2

PWR-64

4Ω

Pass-Thru

8 0Hz-400Hz

12dB/octave BP

30Hz HP*

XCard

250.1

30Hz High-Pass used

as a sub-sonic filter.

30Hz High-Pass used

as a sub-sonic filter.

4Ω

30Hz-80Hz

12dB/octave BP

30Hz-80Hz

12dB/octave BP

RFR-1415

• A sub-sonic filter is a high-pass filter that limits the input signal below a certain motion below that frequency. At very low frequencies

a woofer has no output, just motion. If you try to drive this woofer at these lower frequencies, the woofer could self-destruct. Please refer

to the crossover section of the manual or see your local Authorized Rockford Fosgate Dealer for more information.

– 37 –

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ROCKFORD FOSGATE ACCESSORIES

Balanced Line Transmitter (FG-BLT)

The Balanced Line Transmitter converts signal RCA cables from the source unit to balanced signals. The BLT

improves sound quality in the system by eliminating noises generated by vehicle electrical systems. The BLT is

available for Rockford Fosgate products that offer a balanced input.

AUD

SEL

CLOCK

DSPL

AUT

DISC

AMFM

P.SCN

RPT

LOUD

ST LD RDM RPT

TUNE

PWR

VOL

D.SCN

SCAN

RDM

DIM

PAUSE

BALANCED LINE TRANSM ITTER

NOISE

BALANCED LINE

OUTPUT

INPUT

LED

(Mono)

Speaker

Balanced

Input

Gain

Phase

Bass

Speaker

–

¹⁸⁰°

Balanced

Unbalanced

Pass Thru Pass Thru

EZ Bridged

180°-

0°

ATTENTION: We recommend your Authorized Rockford Fosgate Dealer install your new accessory.

– 38 –

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Energy Storage Capacitors

Energy Storage Capacitors are used to provide extra current needed by amplifiers to reproduce musical transients.

The capacitors also have the natural ability to filter AC ripple caused by the alternator, reducing the chance of noise

in the system. The capacitors are available in a variety of values and will maximize both the sound quality and

performance that Rockford Fosgate amplifiers can deliver.

Power

REM

Dual B+

Dual GND

Battery +

i n

1.0

punch

1 farad • 20 VDC • 95°C

• Recommended capacitance is 1 farad per 1000 watts

XCard Crossovers

Additional crossover card frequencies are available for specialized requirements. You can get the following

XCards from your Authorized Rockford Fosgate Dealer.

XM50

XM70

XM80

50Hz

70Hz

80Hz

XM200 = 200Hz

XM275 = 275Hz

XM400 = 400Hz

XM4.5k = 4,500Hz

XM6.5k = 6,500Hz

XM100 = 100Hz

XM150 = 150Hz

XM00

= Blank card for

custom crossover

Crossover Card

High Pass

Low Pass

Full Range

FULL

ATTENTION: We recommend your Authorized Rockford Fosgate Dealer install your new accessory.

– 39 –

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TROUBLE-

R O U BL E SH O O T I N G

Symptom

Diagnosis

Remedy

Amplifier does not turn on.

(Power LED is off)

Voltage applied to the REM terminal of the

amplifier is not between 10.5 and 15.5

volts or there is no voltage present.

Check the alternator, battery, fuse, and

wiring and repair as necessary. If the volt-

age is above 15.5 volts, have the electrical

system inspected by an authorized car

service center.

Voltage to the B+ terminal of the amplifier

is not between 10.5 and 15.5 volts or there

is no voltage present.

Check the alternator, battery, fuse, and

wiring and repair as necessary. If the volt-

age is above 15.5 volts, have the electrical

system inspected by an authorized car

service center.

Amplifier is not properly grounded.

Check wiring and repair as necessary.

RCA Input from source unit is not connected

or not functioning properly.

Check connections, substitute with known

working source and cables and repair or

replace as necessary.

Amplifier has no sound.

(Power LED is on)

When using the BLT, Balanced Line Input

from BLT is not connected or not function-

ing properly.

Check connections, substitute with known

working BLT and cables and repair or

replace as necessary.

Unbalanced/Balanced Line switch is not

selected for corresponding input.

Check switch position and correct as neces-

sary.

Amplifier is in E-Z Bridge operation but

incorrect signal input, speaker wiring, and/

or left channel 180° phase selection is

chosen.

Checksignal, speakerwiring, andleftchan-

nel phase selection installation and correct

as needed.

XCards are missing or not placed properly

in crossover slots and/or switches are not

properly selected.

Check crossover switches and XCard posi-

tions and repair or replace as necessary.

Speaker leads are shorted to each other or

to the chassis of the vehicle.

Disconnect existing speakers and test with

known working speakers and wires. If am-

plifier plays, check and repair wiring and

installation of speakers as necessary.

Speakers are defective.

Disconnect existing speakers and test with

known working speakers. If amplifier plays,

check and repair speakers as necessary.

– 40 –

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TROUBLE-

Symptom

Diagnosis

Remedy

Speaker Output Low

or Distorted

Input gain(s) for amplifier incorrectly set.

Readjust input gains of amplifier.

Source unit output too low or source unit

has no output.

Check system with known working source

and repair or replace original source as

needed.

Phase selection of amplifier incorrectly se-

lected or speakers wired out of polarity from

the left to right channel.

Check speaker polarity and phase switch

position and correct as needed.

XCards are missing or not placed properly

in crossover slots and/or switches are not

properly selected.

Check crossover switches and XCard posi-

tions and repair or replace as necessary.

Low battery voltage or large voltage drops

to the amplifier under load.

Check the alternator, battery, fuse or circuit

breaker and power and ground wiring and

repair as necessary.

Amplifier Noise

(Turn-on Pop)

Voltage spike from output of preceding

component is entering amplifier through

input signal.

Disconnect input signal to amplifier and

turn amplifier on and off. If noise is elimi-

nated, connect REM lead of amplifier to

source unit with a delay turn-on module.

Voltage spike from remote turn-on lead is

entering through REM input terminal.

Use different 12 volt source for REM lead of

amplifier (i.e., battery direct). If noise is

eliminated, use relay to isolate amplifier

from noise turn-on output.

RCA Input from source unit is not connected

or not functioning properly.

Check connections, substitute with known

working source and cables and repair or

replace as necessary.

No output from Pass-Thru

output of amplifier.

When using the BLT, Balanced Line Input

from BLT is not connected or not function-

ing properly.

Check connections, substitute with known

working BLT and cables and repair or

replace as necessary.

Unbalanced/Balanced Line switch is not

selected for corresponding input.

Check switch position and correct as neces-

sary.

XCards are missing or not placed properly

in crossover slots.

Check crossover switches and XCard posi-

tions and repair or replace as necessary.

– 41 –

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TROUBLE-

Symptom

Diagnosis

Remedy

Low or distorted output from the

Pass-Thru output of the amplifier.

Input gain(s) for amplifier incorrectly set.

Readjust input gains of amplifier.

Source unit output too low.

Check system with known working source

and repair or replace original source as

needed.

XCards are missing or not placed properly

in crossover slots and/or switches are not

properly selected.

Check crossover switches and XCard posi-

tions and repair or replace as necessary.

Low battery voltage or large voltage drops

to the amplifier under load.

Check the alternator, battery, fuse or circuit

breaker and power and ground wiring and

repair as necessary.

RCA cable or amplifier connected to Pass-

Thru output is defective.

Check connections, substitute with known

working amplifier or cables and repair or

replace as needed.

• If noise persists, see your local Authorized Rockford Fosgate Dealer.

– 42 –

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AUTOSOUND 2000's

QUICK CHECK FOR TROUBLESHOOTING

CAR AUDIO SYSTEMS

Preface:

All audio systems exhibit noise; however, if the level of noise is low enough, and the signal level high enough, noise should not be

a problem. This means that it is very important that the signal level throughout the system be optimized BEFORE dealing with your

noise problem. Using a scope (or a small portable amplifier) and Track 99 (1kHz at all high bits) of Rockford Fosgate CD RF-

CD101 (Autosound 2000's CD #101) or Tracks 24 through 29 of Rockford Fosgate CD RF-CD102 (Autosound 2000's CD #102),

adjust the system so that when the maximum usable signal level of the deck is fed into the system, all the preamp level components

clip at the same time. However, we recommend up to as much as a 3:1 voltage overlap with the power amplifiers; i.e. an amplifier

with a 2 volt minimum sensitivity can be driven by up to 6 volts of signal.

Noise Overview:

Car audio electrical accessories are notorious for interfering with car audio systems. The interference commonly arises from three

areas:

1) Power line noise (5%), which can be attenuated with in-line noise filters,

2) Inadequate power supply isolation (45%), which can be cured with transformer signal coupling, additional isolated power

supplies, or changing out components, or

3) Inductive interference (45%) – including loop area inductive noise picked up by the signal cables – which can be remedied by

relocating or rewiring components, rerouting signal cables, or using twisted cable or balanced transmission systems.

Autosound 2000 1-2-3 Method of Logical Troubleshooting

I. MUTE THE AMP(S). Insert a muting plug (shorted male RCA connector) into each amplifier channel. Turn up the amp

sensitivity. Start the car and turn on the headlights, air conditioning, brake lights, etc. Listen for noise in each speaker. Be very

picky here!

A. If still noisy, substitute a small test speaker with short leads for the speakers, crossovers, and speaker leads in the car. If still

noisy, substitute an isolated power supply (120 VAC to 13.8 VDC bench supply or a small motorcycle battery) for the car's

alternator. If the amplifier is noisy with the test speaker, you have a BAD amp. Send it in. It really doesn't matter if it is quiet

or noisy while running on the isolated supply because you have a BAD amp. Send it in for repair and if it was quiet on the

isolated supply, indicate so on the repair tag.

B. If your muted amp is quiet, you've just joined 99.5% of car audio. Amps are usually very clean and do NOT pick up

unwanted noise! Continue on to Step II.

II. DECK TO AMP. Using a new set of signal cables, connect one channel from the output of the deck directly into one channel of

your clean amp. Run the cables outside the car and as far away as possible from the metal of the car. (For noise purposes,

consider a 2" thick cushion of electromagnetic energy emanating from every metal surface in the car.)

A. If still noisy, congratulations, in all probability your equalizer, electronic crossover, DSP, whatchamacallit, are just fine. This

means that you can't get your deck playing quiet with your amp, right? Go to Step III.

B. If all is quiet, congratulations, in all probability your deck and amplifier(s) are fine – you obviously have a problem with

your equalizer, electronic crossover, DSP, etc. Skip on down to “Time for the Processors.”

– 43 –

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III. MOVE THE DECK. If you're at this step, it's time to turn your system into an “amplified deck” by temporarily relocating the deck

right ON TOP of the clean amplifier. Then using very, very short signal cables, connect the output of the deck into the input of

the amp and test for noise. Play a zero bit track – silence – and make sure all is completely quiet.

A. If still noisy, you're in a heap of trouble. We suggest that you try another deck and give us a call so that we can put your

name into the record books. It's a bad car audio day for you.

B. If the deck is quiet, then congratulations, you're on your way to a successful installation. It is now time to slowly, methodi-

cally, reinstall the deck back into its final position. Test for noise each step of the way. If the noise returns, suspect the signal

cables. Forget shielding because it will have only a very, minimal effect within the audio band. We highly suggest using

twisted pair cables or a balanced transmission system for cable induced noise.

Time for Processors:

By the end of Step III, you should have the deck playing quietly with the amp, with the quiet cables quietly routed. So it's time to add

the signal processors – one at a time – back into the system. Simply repeat Steps II and III with the equalizer, then the electronic

crossover, etc. However, before MOVING THE SIGNAL PROCESSORS to the amplifier, we highly suggest that you power the noisy

process from an isolated power supply rather than the car's +12 volts DC and chassis ground. Make sure to also connect the turn-

on lead to the isolated power supply. If the processor is now quiet, then it is highly probable that the component has inadequate

isolation. Solutions include changing components or permanently adding an external isolated power supply (Call Autosound 2000

at 209-465-3450 for info on isolated power supplies).

Summation:

During the design stage of your vehicles, try to avoid using extra batteries and high output alternators. Extra batteries are nothing but

loads as soon as the engine is started and high output alternators usually make more noise than stock alternators. Also, extra

batteries installed in the trunk of a car will ALWAYS force extra ripple current to flow over the car.

Install Stiffening Capacitors^®as close to the power supply input of your amplifier as possible. The big caps will feed the switching

power supplies of your amps and minimize the inductive losses in your power wiring. Plus, they will help your peak system

response.

In problem cases, we highly recommend the use of twisted pair cable rather than coaxial cable for RCA leads. This practice will

greatly minimize cable induced noise – especially in four channel amps!

Don't forget that your system is only as good as its worst component. Do NOT use components with inadequate power supply

isolation or you will be asking for problems.

The best electrical ground on a car is the CHASSIS of the car. Do NOT run ground leads up to the case of the alternator or the negative

battery post. Keep ALL ground leads as short as possible.

With properly isolated components, it does NOT matter where the component is grounded. We're sorry to say that with inadequately

isolated components, it matters! With poorly isolated components, different grounds can cause different noises.

The deck is the signal reference ground for the entire sound system. The deck usually has THREE connections to the car's chassis:

The black ground lead, the base of the antenna, and the metal-to-metal bond between the case of the deck and the chassis of the

car. With three grounds, there is usually NO cause to worry about the ground of a deck.

Amplifiers are usually designed with adequate power supply isolation. This means that it should not matter where a deck is

grounded. (Decks are grounded three times and amps float. This is car audio!)

The more components installed on a signal path, the more chances for noise to enter a system. The more electrical accessories on

a car, the more noise will be produced by the alternator.

This information was compiled from more than 20 years of working in car audio. If you would like more information on this topic,

or any other technical aspects of car audio, please call 800-548-8200 and ask for a subscription to Autosound 2000 Tech Briefs

— the monthly magazine for the technically inclined.

– 44 –

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YN AM I C

O W ER

EASU REM EN T S

About the Dynamic Power Measurements

The Audio Graph PowerCube is a test instrument used to measure the output of an amplifier in accordance with IHF-202 industry

standards. The IHF-202 standard is a dynamic power measurement and was developed as a means of measuring power in a

manner that best represents the Real World operation of an amplifier. Many manufacturers, including Rockford Fosgate, at times

will measure amplifier power into a fixed resistor (4 ohm, 2 ohm). While this method is useful in some types of evaluation and

testing, it is not representative of an amplifier that is connected to a speaker and playing music.

Music

Music is dynamic; the sound waves are complex and constantly changing. In order to simulate this, the IHF-202 standard calls

for the input signal to the amplifier to be a 1kHz bursted tone. This signal is input (on for 20 milliseconds) and reduced 20dB

for 480 milliseconds. The signal is gradually increased in level until the amplifier's output exceeds 1% Total Harmonic Distortion

(THD). At 1% distortion becomes audible, therefore, any power produced above that level is considered unusable. Many

manufacturers represent their amplifiers' output power in excess of 10% distortion. They use many names for this measurement,

such as Total Maximum Power or Maximum Output Power. This is not indicative of the actual usable output power.

Listening to Loudspeakers - Not Resistors

A loudspeaker is not a resistor. A resistor's value (resistance measured in ohms) is fixed. A loudspeaker's impedance is dynamic.

Itisconstantlychanginginvalue, dependentuponthefrequencyoftheinputsignal. Therefore, measuringpowerwiththeamplifier

loaded into a 4 ohm resistor is not the same as measuring power with the amplifier connected to a 4 ohm speaker. Most people

do not listen to music through a resistor.

A 4 ohm speaker may experience a drop in impedance 4-6 times lower than its nominal (printed) impedance. A speaker will also

create phase shifts in the signal that is passed through it. These phase shifts happen because a speaker is an inductor (voicecoil)

and a capacitor (compliance of the surround/spider), as well as a resistor (voice coil wire).

To simulate a speaker the Audio Graph PowerCube measures output power into 20 different loads. It tests at 8 ohms, 4 ohms,

2 ohms and 1 ohm. Each of these impedances is also tested at –60°, –30°, 0°, +30° and +60° phase angles. These different

impedances and phase angles represent the shifts in impedance and phase that can occur in a typical loudspeaker.

Information Cubed

The data acquired in the testing procedure is then

graphedintheformofa 3-dimensionalcube, hence

the name PowerCube.

Audio Graph – The PowerCube™

MODEL BEING

VOLTAGE FROM

BATTERY

x2 = STEREO

TESTED

MONO = BRIDGED MONO

ThePhase Angleis expressed on the horizontal axis,

the Output Voltage is presented on the vertical axis

and the Impedance is displayed on the Z axis.

Output Power, in watts, is listed on the left hand side

for each impedance at each phase angle.

Amplifier: PUNCH 200.2 14.4V x 2

Serial No:

Rated Power : 100 W @ 4 Ohms

Owner

ROCKFORD CORPORATION

8Ω –60° 85

–30° 84

0° 84

POWER

50V

30V

30° 84

60° 86

WATTS

{

4Ω –60° 162

What is an Amplifier?

–30° 157

0° 156

An amplifier by definition is a voltage generating

device, recreating the signal which is input to it

identically but with increased volume. It will be

connected to a reactive load (the speaker). The

impedance of this load and phase of the signal

passing through the load will vary, dependent upon

the frequency of the input signal (music).

30° 157

60° 162

10V

2Ω –60° 273

–30° 258

0° 251

8Ω

4Ω

30° 256

60° 271

2Ω

–60° (Cap)

0°

1Ω

1Ω –60° 390

{

(Ind) +60°

{

–30° 356

0° 346

Impedance

PHASE ANGLES

30° 352

60° 390

• Example of a Punch 200.2 PowerCube

Therefore, a perfect amplifier will be able to main-

tain the same output voltage regardless of load

characteristics and will not alter the signal it is reproducing. A perfect amplifier when measured by the Audio Graph PowerCube

would present data that forms a perfect cube. Unfortunately, amplifiers are not perfect. The laws of physics generally prevent it.

A great amplifier is about the best one can hope to attain.

As you can see by the PowerCube and as you will experience by listening, your Punch amplifier is a GREAT AMPLIFIER!

– 45 –

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250.2 SP EC I FI C ATI O N S

Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4V

Per channel into a 4Ω load

180 Watts

310 Watts

620 Watts

Per channel into a 2Ω load

Bridged into a 4Ω load

Continuous Power Rating (Competition Standard) - Measured at 13.8 Battery Volts

RMS continuous power per channel, both channels driven

into a 4Ω load from 20 to 20,000Hz with less than

0.05% THD (Total Harmonic Distortion)

125 Watts

225 Watts

RMS continuous power per channel, both channels driven

into a 2Ω load from 20-20,000Hz, with less than 0.10% THD

RMS continuous power mono, into 4Ω load

from 20-20,000Hz, with less than 0.1% THD

450 Watts

Common Mode Rejection Ratio (CMRR):

Signal-to-Noise Ratio:

Typically 40dB

>100dB (A-weighted)

20Hz-20,000Hz ±0.5dB

10Hz–250kHz ±3dB

>200

Frequency Response:

Bandwidth:

Damping Factor @ 4Ω (at output connector):

Slew Rate:

50V ms

IM Distortion (IHF):

<0.05%

Input Impedance:

20k Ohms

Source Unit Compatibility (+15dB Gain Overlap)

Input Sensitivity (+0dB Gain Overlap):

Pass-Thru Output (ref. 1V input @ 1kHz):

B+ Fuse Size: (External to amplifier)

Fuse Type:

28V max. input

Variable from 300mV to 5V

Variable form 100mV to 960mV

60 Amp or two 30 Amp

AGU / Maxi Fuse

12dB or 24dB/octave Butterworth

80Hz (0.047mf)

Full Range

Crossover Slope:

Factory Crossover Frequency:

Factory Default Crossover Setting:

Dimensions: (including end caps)

9-5/8"W x 14-9/32"L x 2-5/8"H

(24.4cm) x (36.27cm) x (6.6cm)

Specifications subject to change without notice.

– 46 –

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250.1 SP EC I FI C AT I O N S

Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4V

Mono into a 4Ω load

420 Watts

710 Watts

1420 Watts*

Mono into a 2Ω load

Bridged (using 2 Punch 250m) into a 4Ω load

Continuous Power Rating (Competition Standard) – Measured at 13.8 Volts

RMS continuous power mono, into a 4Ω load from 20-20,000Hz

with less than 0.10% THD

250 Watts

500 Watts

RMS continuous power mono, into a 2Ω load from 20-20,000Hz

with less than 0.15% THD

RMS continuous power bridged, (using 2 Punch 250.1

Power amplifiers in the same system) into a 4Ω load

from 20-20,000Hz with less than 0.15% THD

1000 Watts

Signal-to-Noise Ratio:

>100dB (A-weighted)

20Hz-20,000Hz ±0.5dB

10Hz–250kHz ±3dB

>200

Frequency Response:

Bandwidth:

Damping Factor @ 4Ω (at output connector):

Slew Rate:

50V ms

IM Distortion (IHF):

<0.05%

Input Impedance:

20k Ohms

Source Unit Compatibility (+15dB Gain Overlap):

Input Sensitivity (+0dB Gain Overlap):

Pass-Thru Output:

28V max. input

Variable from 300mV to 5V

Unity Gain

B+ Fuse Size: (External to amplifier)

Fuse Type:

60 Amp or two 30 Amp

AGU / Maxi Fuse

12dB or 24dB/octave Butterworth

80Hz (0.047mf)

Full Range

Crossover Slope:

Factory Crossover Frequency:

Factory Default Crossover Setting:

Dimensions:

9-5/8"W x 14-9/32"L x 2-5/8"H

(24.4cm) x (36.27cm) x (6.6cm)

*This is the calculated Dynamic Power Rating. Actual output power exceeded the input capability of the PowerCube.

Specifications subject to change without notice.

– 47 –

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LIMITED

ARRAN T Y

N FO RM AT I O N

Rockford Corporation offers a limited warranty on Rockford Fosgate products on the following terms:

•

Length of Warranty

3 years on electronics

2 years on source units

90 days on electronic B-stock (receipt required)

30 days on speaker B-stock (receipt required)

•

What is Covered

This warranty applies only to Rockford Fosgate products sold to consumers by Authorized Rockford Fosgate Dealers in the United

States of America or its possessions. Product purchased by consumers from an Authorized Rockford Fosgate Dealer in another

country are covered only by that country’s Distributor and not by Rockford Corporation.

•

Who is Covered

This warranty covers only the original purchaser of Rockford product purchased from an Authorized Rockford Fosgate Dealer in

the United States. In order to receive service, the purchaser must provide Rockford with a copy of the receipt stating the customer

name, dealer name, product purchased and date of purchase.

•

Products found to be defective during the warranty period will be repaired or replaced (with a product deemed to be equivalent)

at Rockford's discretion.

What is Not Covered

1. Damage caused by accident, abuse, improper operations, water, theft

2. Any cost or expense related to the removal or reinstallation of product

3. Service performed by anyone other than Rockford or an Authorized Rockford Fosgate Service Center

4. Any product which has had the serial number defaced, altered, or removed

5. Subsequent damage to other components.

6. Any product purchased outside the U.S.

7. Any product not purchased from an Authorized Rockford Fosgate Dealer

•

Limit on Implied Warranties

Any implied warranties including warranties of fitness for use and merchantability are limited in duration to the period of the express

warranty set forth above. Some states do not allow limitations on the length of an implied warranty, so this limitation may not

apply. No person is authorized to assume for Rockford Fosgate any other liability in connection with the sale of the product.

How to Obtain Service

Please call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return

any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.

Ship to: Speakers

Ship to: Electronics

Rockford Corporation

Warranty Repair Department

2055 E. 5th Street

Rockford Acoustic Design

(Receiving-speakers)

609 Myrtle N.W.

Grand Rapids, MI 49504

RA#:_________________

Tempe, AZ 85281

RA#:_________________

– 48 –

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LEA DETENIDAMENTE LAS SIGUIENTES INSTRUCCIONES DE INSTALACIÓN DEL PRODUCTO. EVITARA POSIBLES DAÑOS

A VD., AL VEHÍCULO O AL PRODUCTO.

INTRODUCCIÓN

Los amplificadores de “la serie 250” representan lo ultimo y mejor que Rockford Fosgate puede ofrecerle. Muchas soluciones

que nuestros ingenieros han inventado serian consideradas absolutamente desproporcionadas por nuestra competencia.

NO EN ROCKFORD FOSGATE! Trans•nova, DIAMOND y TOPAZ diseños exclusivos de Rockford Fosgate, son solo algunas

de las mas sobresalientes innovaciones que describimos con mas detalle en el capitulo de Caracteristicas Técnicas de Diseño

en este mismo manual.

El 250.2 es un amplificador de dos canales optimizado para funcionar con cargas de 2Ω en estereo y 4Ω en mono. El

250.1 es un amplificador de un solo canal optimizado para trabajar con cargas de 2Ω (un solo amplificador) o 4Ω (dos

amplificadores puenteados en un solo canal).

La “Serie 250” utiliza las tecnologias innovadoras de Rockford para conseguir una impresionante calidad de sonido,

funcionamiento duradero y alta potencia de salida sobre bajas impedancias. Todo esto son ventajas para los vehiculos de

competicion.

UBICACIÓN DE LOS AMPLIFICADORES

Maletero

Monte el amplificador vertical con las altas de refrigeración de arriba a abajo. Es el método correcto para asegurarse la

máxima disipación de calor.

Habitáculo

El amplificador montado en el habitáculo funcionara bien en la medida en que se le proporcione ventilación suficiente para

refrigerarse. Si piensa en montarlo debajo de un asiento deberá dejar como minimo un espacio de 3cm alrededor del

refrigerador.

Instalación

• Por seguridad desconecte el cable de masa de la bateria antes de empezar la instalación.

Terminal B+

El cable de alimentación deberá tener un fusible como máximo a 30cm de la bateria. Prepare los terminales del cable e

instale el portafusibles en el vano motor (si la bateria estuviera alli ubicada). Recuerde que toda la instalación debe ser

impermeable.

Terminal GND (Masa o negativo)

Prepare un trozo de cable para usarlocomo toma de masa. Prepare elchasisrascando toda la pintura y suciedad que pudiera

haber hasta dejar la chapa viva. Conecte el chasis a masa con un tornillo.

Terminal REM (Remoto)

Conecte el terminal REM a un punto de 12V con interruptor. Normalmente se usa la salida Remote o de alimentación de

antena del Radio Cassette. Si el Radio Cassette no la tuviera o no estuviera disponible se recomienda tomar de la caja de

fusibles 12V y colocar un interruptor para asi activar el amplificador.

– 50 –

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Operación mono/estéreo

RCA

Input

Unbal.

L (Mono)

EZ-1 8 0 °-0

Speaker

0°^-180°

Bal.

Input

L –

–

Bridged

Pass

Thru

Gain

–

2Ω min.

–

Speaker

Terminal

Speaker

Terminal

–

4Ω min.

• Los conectores de entrada RCA se conectan a ambos canales derecho e

izquierdo

• El conmutador de señal de entrada se colocara en Unbalanced para las

entradas RCA

• El conmutador de fase del canal izquierdo estará en 0 grados

• El conmutador de fase del canal derecho estará en 180 grados cuando se

requiera operación mono/estéro

• La ganancia de los dos canales derecho e izquierdo deberán ser exactamente

iguales para balancear correctamente el subgrave

• La impedancia minima para cada canal es de 2 Ω

• La impedancia minima cuando se trabaje en puente será de 4Ω

• Deberá seleccionarse una XCard (tarjeta del divisor de frecuencias) de banda

completa

• Passive crossovers are needed for proper stereo/mono operation

– 51 –

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ATTENTION: Veuillez lire les instructions suivants pour l'nstallation de ce produit. Ne pas les suivre pourrait causer des

blessures ou endommager le véhicule.

INTRODUCTION

La série d'amplificateurs Power 250 est la vitrine technologique de Rockford Fosgate. Nos ingénieurs utilisent ici des

technologies considérées hors d'atteinte par d'autres fabricants. Trans•nova, DIAMOND et TOPAZ, exclusivement conçues

par Rockford Fosgate, ne sont qu'une partie des technologies spécifiques décrites dans la section “Technical Design Features”

de ce manuel.

Le 250.2 est un amplificateur à deux canaux optimisé pour des charges de 2Ω stéréo et de 4Ω mono. Le 250.1 est un

amplificateur mono optimisé pour une charge de 2Ω (un ampli) ou 4Ω (deux amplis 250.1 pontés ensemble).

La serie “250” utilise les technologies innovatives de Rockford qui lui donne cette impressionante qualité sonore, cette fiabilité

et cette incroyable puissance à de basses impédance. Ceci constitue un avantage sérieux pour des véhicules de compétition.

MONTAGE

Montage dans le coffre

Monter l'ampificateur verticalement avec les rainures de haut en bas ce qui lui permet de refroidir plus facilement.

Montage dans l'habitacle

Monter l'ampificateur dans l'habitacle ne pose aucun problème, du moment qu'il y ait assez d'air pour le refroidir. Si vous

montez l'ampli en dessous de siège, prévoyez 3cm d'air autour du radiateur.

Installation

Pour votre sécurité, déconnectez la borne négative de la batterie du véhicule avant de commencer l'installation.

Terminal B+

Il est impératif qu'il y ait un fusible sur le câble d'alimentation positif le plus près possible de la borne (maximum 30cm).

Préparez les extrémités du câble et installez le porte fusible sous le capot. Les connexions doivent être étanches.

Terminal GND

Préparez une longueur de câble pour la connexion à la masse. Préparez le châssis en grattant la peinture de la surface

métallique et nettoyez la saleté et l'huile. Attachez le câble au châssis avec une vis.

Terminal REM

Connectez le fill REM à une commande 12 volts positive de la source. La commande 12 volts est habituellement prise sur

la sortie antenne électrique de la source ou la commande accessoire. Si la source ne dispose pas de ces sorties, nous vous

recommandons d'installer un interrupteur qui fournira un positif 12 volts au REM de l'ampificateur.

– 52 –

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Opération stéréo/mono (Tri-

mode)

RCA

Input

Unbal.

L (Mono)

EZ-1 8 0 °-0

Speaker

0°^-180°

Bal.

Input

L –

–

Bridged

Pass

Thru

Gain

–

2Ω min.

–

Speaker

Terminal

Speaker

Terminal

–

4Ω min.

• Les entrées RCA sont connectées aux canaux gauche et droit

• L'interrupteur “Signal Input” doit se trouver dans la position “Unbalanced” pour

utiliser l'entrée RCA

• L'interrupteur “Left Phase” doit se trouver dans la position “0°”

• L'interrupteur “Right Phase” doit se trouver dans la position “180°” pour opera-

tion en tri-mode

• Les gains des canaux gauche et droit sont réglés de la même manière pour

équilibrer le subwoofer

• L'impédance de chaque canal devrait être de minimum 2Ω

• L'impédance du canal mono devrait être de minimum 4Ω

• Les XCards sont introduites sur fall range

• Il est conseillé d'utiliser les filtre passifs lorsqu'on fait fonctionner l'amplificateur en

tri-mode

• NE connecter AUCUN des câbles HP à la masse au risque d'un fonctionnement

instable.

• Les filtres passifs sont nécessaires pour une utilisation correcte stereo/mono

– 53 –

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Bitte lesen Sie diese Gebrauchsanleitung zuerst sorgfältig durch. Das kann Sie vor dem falschen Einsatz, Ausfallen oder sogar

Beschädigung des Produktes oder Ihres Fahrzeuges schützen.

EINLEITUNG

Die “250 Serie” Power Verstärker repräsentiert das Beste, was Rockford Fosgate anzubiete hat! Unsere Ingenieure haben in

diesen Verstärkern technische Features realisiert, die in der gesamten Auto HiFi-Industrie, einzigartig sind. Trans•nova,

DIAMOND und TOPAZ exklusive entwickelt von Rockford. Nähere Informationen hierüber und weitere Beschreibungen finden

sie in dieser Gebrauchsanweisung unter Technical Design Features.

Die 250.2 ist ein 2-Kanal Verstärker der an einer last von 2 Ohm Stereo und Mono gebrückt an 4 Ohm optimale Leistung

zeigt. Die 250.1 ist eine Endstufe die optimal an 2 Ohm arbeitet (single amp) oder beim Zusammenschlieβen von zwei

Verstärkern (ein Paar 250.1, gebrückt an eine Lautsprecherlast) an 4 Ohm.

Die“250 ziegerSerie”verwendetRockford'sinnovativeTechnologienfüreinzigartigeKlangqualität, zuverlässigeArbeitsweise

und unendliche Leistung an niedriger Impendanz. Ihr Vorteil beim Bau von ernstzunehmenden Wettberwerbs-Fahrzeugen!

EINBAUORT

Im Fahrzeugkofferraum

Der vertikale Einbau der Endstufen, das bedeutet, daβ die Kühlrippen von oben nach unten verlaufen, gibt dem Verstärker

die beste Kühlung.

Auf der Beifahrerseite

Sollte der Verstärker auf der Beifahrerseite montiert werden, so ist es sehr wichtig, für eine ausreichende Kühlung zu sorgen.

Sollte der Verstärker z.B. unter dem Beifahrersitz montiert werden, sollte dem Kühlkörper mindestens ein Luftspalt von 3cm

bleiben, um so für eine ausreichende Kühlung zu sorgen.

Einbau

Zur Sicherheit klemmen Sie den Negativ-Pol der Batterie während des gesamten Einbaues ab.

B+ Anschluβ

Die Plus-Leitung muβ ca. 40cm nach dem Plus-Pol der Batterie abgesichert sein. Preparieren Sie die Kabellängen und

montieren Sie den Sicherungshalter im Motorraum. ALLE Verbindungen müssen wasserdicht sein.

GND Anschluβ

Preparieren Sie Ihr Kabel für die Negativ Leitung (Erdung). Preparieren Sie die Anschluβstelle des Erdungskabels, indem Sie

das Metall gründlich reinigen und vom Lack befreien. Befestigen Sie nun die Erdung an dieser Stelle mit einer Schraube.

REM Anschluβ

Verbinden Sie das Ein-und Ausschaltkontroll-Kabel mit Ihrem Radio (12 Volt positiv). Normalerweise verwenden Sie hierfür

die Ant.-Remote Ihres Radios oder ein eigens dafür vorgesehenes Kabel (Amp-Remote). Sollte Ihr Radio diesen Anschluβ

nicht besitzen, so verwenden Sie ein 12 Volt Spannung, die Sie durch eine Schalter ein - und ausschalten können.

– 54 –

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Stereo/Mono Betrieb

RCA

Input

Unbal.

L (Mono)

EZ-1 8 0 °-0 °

Speaker

L –

Speaker

0°^-180°

Bal.

Input

–

Bridged

Pass

Thru

Gain

–

2Ω min.

–

Speaker

Terminal

Speaker

Terminal

–

4Ω min.

• Chinch Eingänge des rechten und linken Kanales anschlieben

• Signal Eingangsschalter auf “unbalanced” für den Betrieb mit Chinch-Kabel stellen

• Linken Phasen Schalter auf 0° stellen

• Rechten Phasen Schalter auf 180° stellen für den Stereo/Mono Betrieb

• Die Lautsprecher-Phase des rechten Kanales umkehren, um eine Phasenkorrektur zu

erreichen

• Gain Regler des linken Kanales angleichen, um die Lautstärke des Subwoofers

einzustellen

• Impendanz für jeden Kanal sollte minimum 2 Ohm betragen

• Impendanz im Brückenbetrieb sollte minimum 4 Ohm betragen

• XCard sollte auf Full Range gesteckt werder

• Passive Frequenzweichen werden für korrekte Stereo/Mono Operationen benötigt

– 55 –

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PREGO LEGGERE LE SEGUENTI ISTRUZIONI PER L'INSTALLAZIONE DI QUESTO PRODOTTO, IL NON SEGUIRLE POTREBBE

RISULTARE SERIAMENTE DANNOSO PER LA PERSONA O PER IL VEICOLO.

INTRODUZIONE

La serie 250 Power rappresenta il massimo che Rockford Fosgate ha da offrire! I nostri ingenieri hanno sviluppato delle

innovazioni tecnologiche che per altri costruttori sono considerate fantascienza, ma non per Rockford Fosgate! Trans•nova,

DIAMOND e TOPAZ, esclusivamente progettati da Rockford, sono solo alcune delle innovazioni descritte nella sezione

specifica del manuale.

Il 250.2 é un amplificatore a due canali ottimizzato per pilotare carichi di 2Ω stereo e di 4Ω in mono. Il 250.1 é un

amplificatore ad un canale (mono) ottimizzato per pilotare carichi di 2Ω (singolo amplificatore) o di 4Ω a ponte (due

amplificatore ponticellati funzionanti sullo stesso sistema di altoparlanti).

La “serie 250” impiega tutte le piú innovative tecnologie proprie di Rockford per ottenere una superba qualitá timbrica, grande

affidabilitá, ed elevatissima potenza su carichi molto bassi. Tutto questo á di grande beneficio per le auto che ambiscono

a vincere le gare.

DOVE POSIZIONARLO

Nel Bagagliaio

Montando l'amplificatore su una superficie in verticale con le alette direzionate dall'alto verso il basso si garantirá un miglior

raffreddamento dell'amplificatore.

Nell'abitacolo

Montare l'amplificatore nell'abitacolo si avrá un funzionamento regolare se si garantisce un flusso d'aria sufficiente. Per

l'installazione sotto un sedile, é necessario avere uno spazio di almeno 3 cm attorno a tutto l'amplificatore.

Installazione

Per sicurezza, scollegare il polo negativo della batteria dell'auto prima di iniziare l'installazione.

Terminale B+ (cavo positivo)

Il cavo positivo deve essere protetto da un fusibile a non piú di 45 cm dalla batteria. Terminare il cavo e installare il fusibile

nel vano motore. Tutte le connessioni devono essere a prova d'acqua.

Terminale GND (cavo negativo)

Decidere la lunghezza del cavo e terminarlo. Preparare la massa grattando la vernice dal telaio dell'auto ed eliminando

tracce di olio o sporco. Fissare il cavo di massa al telaio con una vite.

Terminale REM (Consenso di accensione)

Collegare il cavo REM ad un positivo presente solo ad autoradio accesa (normalmente il cavo pilota dell'antenna elettrica

o il cavo accessori dell'autoradio). Se la sorgente non dovesse essere equipaggiata con queste uscite, la soluzione

raccomandabile é di inserire un interruttore su un cavo positivo e connettersi all'amplificatore.

– 56 –

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Stereo/Mono Operation

RCA

Input

Unbal.

L (Mono)

EZ-1 8 0 °-0

Speaker

0°^-180°

Bal.

Input

L –

–

Bridged

Pass

Thru

Gain

–

2Ω min.

–

Speaker

Terminal

Speaker

Terminal

–

4Ω min.

• RCA inputs non sono collegati ad entrambi, i canli destro e sinistro

• Interruttore di segnale input selezionato per il non bilanciamento per l'input

RCA

• Fase sinistra dell'interruttore posizionata su 0°.

• Fase destra dell'interruttore posizionata su 180° per l'operazione stereo/mono

• Tutta la polaritá dell'altoparlante del canale destro é invertita per correggere il

segnale di fase

• Gain per i canali destro e sinistro posizionati ugualmente per bilanciare i

subwoofer

• Impedenza per ogni canale deve essere minimo 2Ω

• Impedenza per i canali a ponte deve essere minimo 4Ω

• XCard é posizionata per tutto il range

• Crossover passivi sono indispensabili per un corretto funzionamento stereo/

mono

– 57 –

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MADE IN THE USA

This product is designed, developed and assembled in the USA by a dedicated

group of American workers. The majority of the components used in the construc-

tion of this product are produced by American companies. However, due to the

global nature of their manufacturing facilities and the loudspeaker parts industry in

general, some parts may be manufactured in other countries.

Rockford Fosgate

Rockford Corporation

546 South Rockford Drive

Tempe, Arizona 85281 U.S.A.

In U.S.A., (602) 967-3565

In Europe, Fax (49) 4202-9750-50

In Japan, Fax (81) 559-79-1265

MAN-1529-B

10/97

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