AMPLIFIERS
GPV700.2 / GPV1000.2
GPV1000.4 / GPV1600.4
GENERAL INSTALLATION PROCEDURE
System Design
The success of any car stereo system relies on several factors, such as the system design, execution of the installation, and system setup. Please
remember that any system is only as good as its weakest link.
Please remember that higher power systems are not necessarily useful purely for high sound pressure levels, but also to establish a headroom capability, to
reproduce musical peaks cleanly without distortion. Lower power amplifiers will clip earlier than their more powerful cousins, and cause loudspeaker failure when
overdriven, due to the harmonics generated by a clipped signal, thus overheating voice coils.
Amplifiers should be mounted with the fins running horizontally for best convection cooling, to minimize overheating. Purchase the best quality RCA cables you can
afford, for reliability and less engine noise interference in the audio system.
Installation
+
+
WOOD
+
It is highly recommended that the amplifier be mounted to a board of MDF or other solid
structure using the 4 mounting screws provided. Avoid mounting the
30th ANNIVERSARY
GROUND POUNDER
amplifier to metal as this can introduce noise and other unwanted issues. When mounting
the amplifier, ensure that it is mounted HORIZONTALLY, as shown in the diagram above, for
optimal heat dissipation. Mounting amplifiers to speaker enclosures is not recommended as
this can cause damage to the amplifier components. When choosing a location for
mounting the amplifier, ensure that you check for clearance from wires, gas tank, electrical
devices and brake lines etc.
+
+
General:
Run the wiring so that RCA cables are at least 18“ away from power and speaker cables. Keep RCA cables away from electrical devices in the vehicle that can cause
electrical noise, such as electric fuel pumps, emission control modules and other on-board electronic modules.
Power and ground connections(see the features matrix on page 9 for proper gauge cables per amplifier):
Use a sufficient gauge power cable and ground cable using the chart below as reference to what size wire you require. In a multi amplifier system, add the total value
of the manufacture recommended fusing to get your total system amperage. Some applications may require multiple runs of power wire to meet the system
requirements. In multi amplifier systems it is advisable to mount a large enough fuse right at the battery, and run one or multiple +12 volt power cables to a fused
distribution block near the amplifiers. It is then a simple matter to connect the +12 volt terminal of each amplifier to the distribution block. During this process, please
ensure that the main power fuse is removed to avoid shorting the electrical system. The main fuse must be within 12” of the vehicles battery.
Ground each amplifier with as short a ground lead as possible directly to the vehicle chassis using 4 gauge wire or equivalent to the size of the amplifiers’ power wire.
Use a ground distribution block, if you wish, but it is extremely important to keep the main ground lead from this distribution block to the chassis as short as possible ,
not more than 12“. The ground connection integrity to the chassis is very important, and the best way to achieve a good, solid electrical and mechanical contact is to
use a large round crimp lug, crimped and soldered to the ground cable. The next step is to scrape the paint off the vehicle chassis , slightly larger than the ground
lug, at the connection point. Drill a clearance hole in the chassis, the same size as the lug hole, and use a bolt, spring washer and nut to securely fasten the ground
lug. Use petroleum jelly to coat the bolt/lug connection, to prevent oxidization with time.
TIP: Use the same approach when installing head units, equalizers or any audio equipment for that matter - run short individual grounds from each piece directly to
the vehicle chassis, to minimize ground loops and system noise. All power, ground and speaker connections should be crimped and soldered for reliability. Make sure
that none of the cable insulation can chafe against exposed metal in the vehicle, causing short circuits to the chassis.
WIRE LENGTH
SYSTEM
AMPERAGE
7-10 ft.
10-13 ft.
13-16 ft.
16-19 ft.
19-22 ft.
22-28 ft.
NOTE: This Matrix is a general rule
of thumb. Please refer to the
manufacturers specific
requirements. GPV specifications
can be found on page 9.
35-50
8
6
4
4
4
2
6
4
4
2
2
0
4
4
2
2
0
0
4
4
2
2
0
0
4
4
2
2
0
0
4
2
0
0
0
0
50-65
68-85
85-105
105-125
125-150
Safe connection sequence:
After all cables are run, connect speaker wires to the speakers and amplifiers, then run and plug in RCA cables. Next, connect all power, ground, and remote turn on
leads. Now connect all +12 volt cables to the amplifier/s and distribution blocks and fuse holders. Finally, connect the main +12 volt cable to the battery, with the main
fuse removed, and we are almost ready to power up the system.
Power up the system:
The following procedure may seem like overkill, but there is nothing more frustrating when turning on a system for the first time, and it does not work properly
immediately.
First, make sure the head unit is off, and turn all level controls to minimum (counterclockwise), including the head unit volume control. Set all equalizers to 0 dB (no
boost), and all crossover frequency controls at approximate frequencies, as recommended by the loudspeaker manufacturer. Set all input selector and crossover
switches as required for the application. Remove all amplifier fuses, and insert the main fuse at the battery. If the fuse does not blow, you can insert the fuse in one of
the amplifiers, and we are ready to turn on the system. Turn the head unit on, insert a CD, or select a radio station, and increase the head unit volume control. If the
system sounds fine, turn off the head unit, and install fuses in the remaining amplifiers, one by one, till the complete system is powered up and functioning properly.
1
AMPLIFIER FEATURE DESCRIPTIONS
GROUND POUNDER GPV AMPLIFIERS:
! Each model is capable of 4 & 2-Ohms stereo per channel, or 4-Ohms mono bridged operation
except the mono amps which are capable of 4, 2 and 1-Ohm loads.
! Tri-Mode operation with any stereo pair of amplifier channels is possible, as with all bridgeable
amplifiers.
! A POWER LED indicates the powered up and turned on condition.
! All Crunch amplifiers feature a comprehensive diagnostic system, with speaker lead short circuit,
and amplifier DC faults indicated by the red “PROTECT” LED.
! CAUTION: DO NOT OPERATE ANY AMPLIFIER BELOW THE INTENDED IMPEDANCE. YOU
WILL CAUSE DAMAGE TO THE AMPLIFIER THAT WILL NOT BE COVERED UNDER THE
WARRANTY PRINTED IN THE BACK OF THE MANUAL. 2 & 4 Channel amps are capable of 4
and 2-Ohms wired stereo and 4-Ohms wired mono bridged. The mono amps are capable of 4, 2
and 1-Ohm.
! The input sensitivities for rated output powers are variable from 0.2 volts to 5 volts on multi channel
models and 0.2 volts to 6-9 volts on mono models.
! All crossovers are fully variable in their respective ranges.
! Crossover filters are 12dB/Octave.
GPV700.2 / GPV1000.2 2-CHANNEL AMPLIFIERS
TheX-OVERslide switch selects theinternal crossover functions:
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting
simplifying daisy chaining ofamplifiers.
-HPF:Selects thebuilt in HIGHPASSfilter, variable from 60Hzto1.2kHz.
-FULL:Bypasses all crossovers forfull frequency rangeoperation.
-LPF:Selects thebuilt in LOW PASS, variable from 30Hzto250Hz.
MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO
forbridging operation
LINE OUT LINE INPUT
X-OVER
MODE
LEVEL
5V 0.2V
BASS EQ
HPF
LPF
FLASH
NO FLASH
L
L
+
- gnd
-
+
HI INPUT
FULL LPF HPF MONO
STEREO
0dB 9dB 60Hz 1.2KHz 30Hz 250Hz
R
R
HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the
HIGHlevel (wire)inputs.
LINEINPUT:Theline input accepts unbalanced (RCA)inputs from 0.2Vto5V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from onesignal.
NotethattheLOW PASSsignal isMONO.
-In the LPF position, the HIGH PASS filter acts as a subsonic
filter.
-When the LPF mode is selected, a 0 to +9dB, at 45Hz, BASS -
EQ isalsoswitched in.
GPV1000.4 / GPV1600.4 4-CHANNEL AMPLIFIERS
The 4 channel amps have the same features as the 2 channel models accept that there are 2 sets of
controls.
1set forchannels 1&2and1set forchannels 3&4.
In addition, the 4 channel models have a Mode switch which allows you to select 2, 3 or 4 channel
operation.
TheX-OVERslide switch selects theinternal crossover functions:
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting
simplifying daisy chaining ofamplifiers.
CHANNEL 3 / 4
LEVEL BASS EQ HPF
LPF
CH3 CH4
- gnd -
LINE OUT
X-OVER
MODE
LINE INPUT
R
L
+
+
2
CHANNEL
3
4
FLASH
5V 0.2V
0dB 9dB 60Hz 1.2KHz 30Hz 250Hz
FULL LPF HPF
X-OVER
HI INPUT
- gnd -
NO FLASH
LEVEL BASS EQ HPF
LPF
+
+
CH3/4
CH1/2
CH1 CH2
5V 0.2V
0dB 9dB 60Hz 1.2KHz 30Hz 250Hz
CHANNEL 1 / 2
FULL LPF HPF
-HPF:Selects thebuilt in HIGHPASSfilter, variable from 60Hzto1.2kHz.
-FULL:Bypasses all crossovers forfull frequency rangeoperation.
-LPF:Selects thebuilt in LOW PASS, variable from 30Hzto250Hz.
MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO
forbridging operation
HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the
HIGHlevel (wire)inputs.
LINEINPUT:Theline inputaccepts unbalanced (RCA)inputs from 0.2Vto5V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from onesignal.
Notethat the LOW PASSsignal isMONO.
-In the LPF position, the HIGH PASS filter acts as a subsonic
filter.
-When the LPF mode is selected, a 0 to +9dB, at 45Hz, BASS -
EQ isalsoswitched in.
-The LINE INPUT signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER
setting simplifying daisy chaining ofamplifiers.
GPV2000.1 1-CHANNEL A/B CLASS MONO BLOCK AMPLIFIERS
-SUBSONIC:Allows you toadjust thecrossover filter from 15Hzto35Hz.
-LPF:Allows yo toadjust theLOW PASScrossover filter from 35Hzto250Hz.
LEVEL: Adjusts theinput sensitivity from 0.2volts to6volts.
OUTPUT INPUT
POWER
BASS
BOOST
SUB
SONIC
LOW
PASS
LEVEL
PROTECT
L
L
FLASH
BASSEQ:TheBass EQis adjustable from 0dbto9dB.
NO FLASH
REMOTE
REMOTE:This is theinputjack fortheremote Level control.
0dB
9dB 15Hz 55Hz 40Hz 150Hz 6V
0.2V
R
R
LINEINPUT:Theline input accepts unbalanced (RCA)inputs from 0.2Vto6V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from onesignal.
The monoampsarecapableof4, 2&1-Ohm loads.
Operating the amp below 1-Ohm can cause damage to the
amp notcoveredin thewarranty.
LINEINPUT:Accepts unbalanced RCAinputs from 0.2volts to9volts.
LINE OUTPUT: The unbalanced RCA outputs are set the same as the CROSSOVER switch on the
side mount control.
GPV3000.1D PRO 1-CHANNEL D-CLASS MONO AMPLIFIERS
BALANCED INPUT:Accepts balanced line inputs from 0.4 volts to 12 volts for the optional MMBLD-
1balanced line driver.
INPUT OUTPUT
BALANCED LEVEL
INPUT
PHASE
REMOTE
BASS EQ
SUBSONIC
LOW PASS
PWR
L
L
IN
LEVEL:The input level control allows you to match the amplifier input sensitivity to the output level of
the RADIO/CD source from 0.2 volts to 9 volts when using unbalanced (RCA) and 0.2 volts to 18
volts withthebalanced input.
OUTPUT
9V
0.2V
0
180
0dB 10dB
15
35Hz 35 250Hz PRO MASTER
INPUT
SLAVE
OUT
R
R
PHASE:ThePhaseshift is fully adjustable from 0to180degrees.
REMOTE:This is theinput jack fortheremoteLevel control.
BASSEQ:TheBass Boostis fully adjustable from 0to10dbat45Hz.
SUBSONIC:Thevariable Subsonic filter is fully adjustable from 15Hzto35Hz.
LOWPASS:Thebuilt-in low pass frequencies arefully variable from 35to250Hz.
POWER:Indicates thattheamp has power, groundandremoteturn-oninputvia agreenL.E.D.
PROTECT: Indicates that the amplifier has detected a fault and will not operate. There are several
possible problems that can cause the amplifier to go into the protect mode. See the trouble
shootingguidein theback ofthemanual fordetails.
Themono ampsarecapableof 4, 2&1-Ohm loads.
Operating the amp below 1-Ohm can cause damage to the
ampnot coveredin thewarranty.
2
GPV700.2 / GPV1000.2 2 CHANNEL AMPLIFIER APPLICATIONS
FULL RANGE STEREO
This is the most basic application for the GROUND POUNDER Series 2 channel
amplifiers.
3. Crossoverfrequencycontrolchecklist:
N/Afor full rangeoperation.
4. LineLevel:
1. Interconnectcablechecklist:
ConnecttheLINEINPUTStotheRadio/CD withgoodquality RCAcables.
2. CrossoverSwitch:
Refertothesection “Settingupsystems afterinstallation forbest performance”.
TheX-OVERswitch must bein theFULLposition.
TheMODEswitch must bein theSTEREOposition.
NOTE:Minimum finalloudspeakerimpedances:
4&-2-Ohmsstereomodeor4-Ohms monomode
FULL RANGE
STEREO LINE INPUT
FULL RANGE
SPEAKERS
30th ANNIVERSARY
TO BATTERY + 12 volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
GROUND POUNDER
FULL RANGE MONO
This application illustrates the basic mono bridging method for all Crunch 2 channel
amplifiers.
Switchsettingchecklist:
-TheX-OVERswitch must bein theFULLposition.
-TheMODEswitch must bein theMONO position.
Interconnectcablechecklist:
A MONO signal source is required, such as would be available from the mono sub bass
output of an active crossover, whether stand alone, or built into a head unit or equalizer.
Important: Do not be tempted to connect the hot, or positive outputs, from any source
together to obtain a mono signal, as this could very well damage the output stage of that
source.
Crossoverfrequencycontrolsettingchecklist:
N/Afor full rangeoperation.
TIP: If you are using the mono sub bass output of an active crossover, there is nothing
wrongwithswitching in thelow pass filter in these amplifiers for asteeper low pass roll-off.
It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter RCA
cable. Connect the mono speaker positive terminal to the LEFT +, and its negative
terminal toRIGHT-.
Minimum final loudspeakerimpedance:
-4-Ohms mono.
FULL RANGE
MONO SPEAKER
FULL RANGE
MONO LINE INPUT
VIA Y-ADAPTER
FROM MONO SOURCE
30th ANNIVERSARY
TO BATTERY + 12 volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
GROUND POUNDER
The HIGH LEVEL inputs are used when the radio/CD player does not have RCA cable outputs. You can connect the radio/CD player speaker wires directly
to the amplifier via the high Level Inputs.
Use both connectors for 4 CH amplifiers
Use this connector for 2 CH amplifiers
GRAY: CH 1 Speaker Input +
BROWN: CH 1 Speaker input -
Black: Chassis Ground
ORANGE: CH 3 Speaker Input +
PINK: CH 3 Speaker input -
Black: Chassis Ground
GREEN: CH 2 Speaker Input -
White: CH 2 Speaker Input +
BLUE: CH 4 Speaker Input -
YELLOW: CH 4 Speaker Input +
3
GPV700.2 / GPV1000.2 2-CHANNEL AMPLIFIER APPLICATIONS
Stereo high pass with mono low-pass in a 2 way active, or bi-amplified system
In this application we will use a 2 channel amplifier for the high frequencies, and a second
one for the low frequencies, or mono sub bass. Please consult the speaker specifications
todetermine maximum amplifier powerrequirements.
Crossoverfrequencycontrolchecklist:
Highsamplifier:
-HIPASS:100Hz
-LOW PASS:N/A
Interconnectcablechecklist:
Connect the inputs of the HIGHS amplifier to a Radio/CD with good quality RCA cables.
Connect the LINE OUT of the HIGHS amplifier to the inputs of the BASS amplifier with a
stereo RCAtoRCAcable.
Lows amplifier:
-HIPASS(Subsonicfilter):10Hzto 40Hz
-LOW PASS:80Hz
Mono basswooferwiring:
Connect the mono speaker positive terminal to the RIGHT +, and its negative terminal to
LEFT-.
Please note that these frequency points are suggestions only. Refer to the loudspeaker
manufacturer specifications and the section “Setting up systems after installation for best
performance”
Switchsettingchecklist:
Levelcontrolchecklist:
- Refertothesection “Setting upsystems afterinstallation for best performance”
- Highsamplifier: X-OVERswitch in theHPFposition.
MODEswitch in theSTEREOposition.
- Lows amplifier: X-OVERswitch in theLPFposition.
MODEswitch in theMONO position.
Minimum final loudspeakerimpedances:
-2-Ohms perchannelstereo.
-4-Ohms monobridged.
FULL RANGE
STEREO LINE INPUT
FULL RANGE
SPEAKERS
30th ANNIVERSARY
TO BATTERY + 12 volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
GROUND POUNDER
STEREO
INTERCONNECT
RCA CABLE
MONO BASS
SPEAKER
30th ANNIVERSARY
GROUND POUNDER
TO BATTERY + 12 volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
4
GPV1000.4 / GPV1600.4 4 CHANNEL AMPLIFIER APPLICATIONS
4 CHANNEL FULL RANGE SYSTEM
Here we show how to use the 4 channel amplifiers as straight forward discrete 4 channel
full rangeunits.
Crossoverfrequencycontrolchecklist:
Channels1/2:
-HIPASS:N/A
Interconnectcablechecklist:
- Connectthefour inputs oftheamplifier toaRadio/CDwithquality RCAcables.
-LOW PASS:N/A
Channels3/4:
-HIPASS:N/A
Switchsettingchecklist:
- 1/2CHX-OVER: FULL
- 3/4CHX-OVER: FULL
- MODE:4CHANNEL
-LOW PASS:N/A
Levelcontrolchecklist:
- Refertothesection “Setting upsystems afterinstallation for best performance”
Minimum final loudspeakerimpedances:
-2-Ohms perchannel.
FULL RANGE
SPEAKERS
30th ANNIVERSARY
FULL RANGE
STEREO LINE
INPUTS
TO BATTERY + 12 Volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
FULL RANGE
SPEAKERS
GROUND POUNDER
2 or 3 CHANNEL FULL RANGE SYSTEM
Here we show how to use the 4 channel amplifiers as full range 2 or 3 channel units by
taking advantage of the mono bridging capability of all Crunch amplifiers.
Crossover frequency control checklist:
Channels 1/2:
- HI PASS: N/A
The following example shows how to create a 3 channel system by mono bridging
channel pair 3 / 4. In order to create a 2 channel system, simply follow the example to
also mono bridge channel pair 1 / 2.
- LOW PASS: N/A
Channels 3/4:
- HI PASS: N/A
- LOW PASS: N/A
Interconnect cable checklist:
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit
with good quality RCA cables.
- A MONO signal source is required to bridge channel pair 3/4, such as would be
available from the mono sub bass output of an active crossover, whether standalone,
or built into a head unit or equalizer.
TIP: If you are using the mono sub bass output of an active crossover, there is nothing
wrong with switching in the low pass filter in these amplifiers for a steeper low pass
rolloff.
Important: Do not be tempted to connect the hot, or positive outputs, from any source
together to obtain a mono signal, as this could very well damage the output stage of
that source.
Level control checklist:
- Refer to the section “Setting up systems after installation for best performance”
- It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter
RCA cable.
- Connect the mono speaker positive terminal to the LEFT +, and its negative terminal
to RIGHT - as shown.
Switch setting checklist:
Minimum final loudspeaker impedances:
- 2-Ohms per channel in stereo mode.
- 4-Ohms mono bridged.
- 1/2CH X-OVER: FULL
- 3/4CH X-OVER: FULL
- MODE: 3 CHANNEL
MONO
OR SUB BASS
SPEAKER
1 STEREO
1 MONO
FULL RANGE
LINE INPUTS
30th ANNIVERSARY
TO BATTERY + 12 Volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
FULL RANGE
SPEAKERS
GROUND POUNDER
5
GPV1000.4 / GPV1600.4 4 CHANNEL AMPLIFIER APPLICATIONS
2 way active, or bi-amplified system with mono bass
This application shows how easily a 2 way active system can be implemented using a 4
channel amplifier. Channels 1 and 2 will be used for highs, and channels 3 and 4 for mono
bass.
Crossoverfrequencycontrolchecklist:
Channels1/2:
-HIPASS:100Hz
-LOW PASS:N/A
Channels3/4:
Interconnectcablechecklist:
- We need to feed the same signal to both sets of channels, so must use 2Y-adapters, one
to feed the LEFT signal to channels 1 and 3, and the right signal to channels 2 and 4, as
shown.
-HIPASS(subsonic):20Hz
-LOW PASS:100Hz
Please note that these frequency points are suggestions only. Refer to the loudspeaker
manufacturer specifications and the section “Setting up systems after installation for best
performance”
Mono basswooferwiring:
- Connect the mono speaker positive terminal to the LEFT +, and its negative terminal to
RIGHT -.
Levelcontrolchecklist:
Refertothesection “Settingupsystems after installation forbest performance”
Switchsettingchecklist:
- 1/2CHX-OVER: HP
- 3/4CHX-OVER: LPF
Minimum final loudspeakerimpedances:
-2-Ohms perchannelinstereomode.
-4-Ohms monobridged.
LEFT TO
CHANNELS
1 AND 3
MONO
SUB BASS
SPEAKER
RIGHT TO
CHANNELS
3 AND 4
30th ANNIVERSARY
TO BATTERY + 12 Volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
STEREO
HIGHS
SPEAKERS
GROUND POUNDER
2 way active, or bi-amplified system with mono bass, and faded highs/lows
Here we present a variation of the previous system. Since this is a 2 way system, we can
use the front outputs from a head unit to drive the highs, and the rear output to drive the
bass This method allows the listener to easily adjust the relative levels of bass to highs,
withthefront torear fadeontheheadunit.
Interconnectcablechecklist:
- Usegoodquality RCAleads toconnect theinputs oftheamplifier tothesource as shown.
- Follow theinstructions as per theprevious system for switch andcrossover settings.
Channels 1and2will beused for highs, andchannels 3and4for mono bass.
MONO
SUB BASS
SPEAKER
FULL RANGE
STEREO LINE
INPUTS
30th ANNIVERSARY
TO BATTERY + 12 Volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
STEREO
HIGHS
SPEAKERS
GROUND POUNDER
6
GPV2000.1 A/B CLASS 1 CHANNEL AMPLIFIER APPLICATION
Basic application
These sub bass amplifiers can be used in any of the bi-amplification systems described in
this manual, replacing the2channel amplifiers as pertheillustrations.
Crossoverfrequencycontrolchecklist:
LOW PASS:35Hzto250Hz
SUBSONIC:15Hzto 35Hz
BASSEQ:0to+9dB
Interconnectcablechecklist:
Connect the inputs to a suitable source, e.g. a head unit with good quality RCA cables.
ConnecttheLINEOUTtotheinputs ofthesystem highs amplifier.
PHASE:0to 180degrees
Levelcontrolchecklist:
Refertothesection “Settingupsystems after installation forbest performance”
Use at least #12 gauge speaker wiring. The amps have dual speaker terminals,
simplifying thehookup ofmultiple speakers
Minimum final loudspeakerimpedance:1-Ohm.
MONO
SUBWOOFER
MIN
GPR-1
MAXX
30th ANNIVERSARY
GROUND POUNDER
TO BATTERY + 12 Volts VIA FUSE
REMOTE TURN-ON
CHASSIS GROUND
DESIGNATED
MONO OUTPUT
FROM HEAD UNIT
PARALLEL MONO
SUBWOOFERS
2-OHMS EACH MINIMUM
FULL RANGE
STEREO LINE INPUT
Y-ADAPTOR
NOT USED
Note: You can use the Radio/CD designated mono line output or a full range stereo line output.
For full range stereo line output, you will need an optional “Y-Adaptor” as shown.
7
GPV3000.1D PRO D CLASS 1 CHANNEL AMPLIFIER APPLICATIONS
Basic application
SINGLEAMPINSTALLATION PROCEDURE:
1. Connect the amp LINE INPUTS to the Radio/CD player full range or mono line out
puts with good quality RCA interconnect cables.
FULL RANGE
STEREO LINE INPUT
Y-ADAPTOR
2. Plugin theGPR-1bass remote module into theamp REMOTEINPUTjack.
3. Routea0gaugepowercables directly tothevehicle battery withanin-line fuse.
4. Connecta0gaugegroundcables directly tochassis groundwithin 36”oftheamp.
- Besure toremove any paint or primer from thegroundpoint.
- Useanut, bolt andlock washer tosecure thegroundcable tothechassis ground.
5. Connectthesubwoofer(s) in accordance tothediagrams below.
NOT USED
Note: You can use the Radio/CD designated mono line output
or a full range stereo line output. For full range stereo line
output, you will need an optional “Y-Adaptor” as shown.
6. Make sure theMASTER/SLAVEswitch is in theMASTERposition.
Note:Theamplifier will notworkif theMASTER/SLAVEswitch is in theSlave position
MONO
SUBWOOFER
PARALLEL MONO
SUBWOOFERS
DESIGNATED
MONO OUTPUT
FROM HEAD UNIT
2 OHMS EACH MINIMUM
REMOTE TURN-ON
30th ANNIVERSARY
MIN
MAXX
GPR-1
POWER
+12V GND
SPEAKER
-
CHASSIS GROUND
-
REM
+
+
TO BATTERY + 12 Volts
VIA FUSE
GROUND POUNDER
DUAL AMP INSTALLATION PROCEDURE:
1. Connect the amp LINE INPUTS to the Radio/CD player full range or mono line out
puts with good quality RCA interconnect cables.
2. Plug in the GPR-1 bass remote module into the amp REMOTE INPUT jack. This will
allow the Master amp to control both Master and Slave amps with just one Remote..
3. Connect an RCA jumper cable from the Master amp MASTER OUTPUT to the
Slave amp SLAVE INPUT. Note: This will “link” the amps so that the Master amp
crossover switches will control both the Master and Slave amps. The Slave amp
crossover switches will be bypassed.
5. Connect two 0 gauge ground cables directly to the chassis with in 36” of the amp.
- Be sure to remove any paint or primer from the ground point.
- Use a nut, bolt and lock washer to secure the ground cable to the chassis ground.
6. Make sure the Master amp MASTER/SLAVE switch is in the MASTER position.
Make sure the Slave amp MASTER/SLAVE switch is in the SLAVE position.
7. Connect the subwoofer(s) in accordance to the diagrams below.
8. Connect a 12 gauge jumper from Master amp speaker - to Slave amp speaker - as
shown below.
4. Route two 0 gauge power cables directly to the vehicle battery with an in-line fuse.
Linking two amps for single or dual subwoofer application
POWER
+12V GND
SPEAKER
-
POWER
+12V GND
SPEAKER
-
-
-
REM
+
+
REM
+
+
MASTER
DESIGNATED
MONO OUTPUT
FROM HEAD UNIT
DUAL VOICE COIL
SUBWOOFER /
AMPLIFIERS NOT
LINKED
th ANNIVERSARY
OUTPUT
MIN
GPR-1
MAXX
MASTER
SINGLE REMOTE,
CONNECTED TO MASTER
AMP, USED TO CONTROL
BOTH AMPS WHEN LINKED
INPUT
SLAVE
Amplifiers are stable to 2ohms when linked
GROUND POUNDER
SUBWOOFER
SLAVE
POWER
+12V GND
SPEAKER
-
POWER
+12V GND
SPEAKER
-
-
-
REM
+
+
REM
+
+
th ANNIVERSARY
OUTPUT
MASTER
INPUT
SLAVE
TWO SUBWOOFERS /
TWO AMPLIFIERS
NOT LINKED
- +
- +
GROUND POUNDER
8
6
9
SETTING UP SYSTEMS AFTER INSTALLATION FOR BEST PERFORMANCE
GPV700.2 / GPV1000.2 / GPV1000.4 / GPV1600.4
General:
At this point you are ready to get more specific on the settings for your amplifier.
High Pass:
-When in Hi Pass operation, this setting acts as a low frequency cut off for your system reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this
point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 100Hz, the amplifier will not play frequencies below 100Hz but will play frequencies from
100Hz to the chosen Low Pass frequency.
-When in Low Pass/Bandpass operation, this setting acts as a low frequency cut off for your system reproduction aka Subsonic Filter. The point that you set it at cuts off any frequencies
from reproduction beyond this point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 25Hz, the amplifier will not play frequencies below 25Hz
but will play frequencies from 25Hz to the chosen Low Pass frequency.
-When in Flat/Full operation, the High Pass crossover is bypassed.
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable from 0-12dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to
your speakers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless listening at a low
volume or a low recording quality as this can result in high distortion and possibly clipping.
Low Pass:
The Low Pass control acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. Turning the potentiometer all the way to the right is a great
starting point. EXAMPLE: If you adjust the Low Pass to 120Hz, the amplifier will not play frequencies above 120Hz but will play frequencies from 120Hz to the chosen Hi Pass or
Subsonic frequency.
-When in Hi Pass operation, this setting is bypassed.
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input
sensitivities properly to the head unit output signal level.
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these general guide lines:
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the
left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/speaker combo has reached its maxx
output in this application.
2or3 way activesystems(all):
Always start withthebass, or low frequency amplifier as areference, by turning its control uptothepoint wheredistortion is audible, andback it offsome.
Nowadjust thelevel control for thehighs or tweeterchannels in a2wayactive system, tobalance thehighs tolows.
In a 3 way active system, match the midrange level to the bass, and then the highs to the midrange and bass. It may be necessary to perform a few iterations of the midrange and highs level
GPV2000.1 / GPV3000.1D PRO
General:
At this point you are ready to get more specific on the settings for your amplifier.
Subsonic:
This setting acts as a low frequency cut off for your system bass reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this point. The 12 o’clock
position is a great starting point. EXAMPLE: If you adjust the Subsonic to 25Hz, the amplifier will not play frequencies below 25Hz but will play frequencies from 25Hz to the chosen Low
Pass frequency.
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable from 0-10dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to
your subwoofers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless listening at a
low volume or a low recording quality as this can result in high distortion and possibly clipping.
Low Pass:
The Low Pass control acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. The 12 o’clock position is a great starting point. EXAMPLE: If you
adjust the Low Pass to 80Hz, the amplifier will not play frequencies above 80Hz but will play frequencies from 80Hz to the chosen Subsonic frequency.
Phase:
The variable Phase adjustment allows you to change the relative time that the waveform meets your ear. With standard subwoofer installations where the subwoofer is behind you, the
Phase should generally be at 0. When subwoofers or woofers are in the kick panels or door panels, the Phase adjustment is useful in delaying the timing of the wave meeting your ear by
adjusting the potentiometer to 180 degrees.
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input
sensitivities properly to the head unit output signal level.
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these general guide lines:
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the
left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/subwoofer combo has reached its maxx
output in this application.
Sit back and enjoy the music!
10
TROUBLESHOOTING A SYSTEM
Thekeytofindingtheprobleminamisbehavingsoundsystemistoisolatepartsofthatsysteminalogicalfashiontotrackdown thefault.
DescriptionofthePROTECTsystembuiltintoallGROUNDPOUNDERamplifiers
The diagnostic system will shut down the amplifier, until reset by turning the head unit off, and back on. This state of affairs will be indicated by the front panel PROTECT
LEDlighting upunderthefollowing conditions:
1-Asort circuit ontheloudspeaker leads.
2-Aninternal amplifier fault thatcauses aDCoffset ontheloudspeaker output.
Shouldtheamplifier gointo protect mode, simply disconnect all RCAandspeaker leads, while keeping +12volt, powergroundandremote leads connected.
1. Nowturntheamplifier back on, andif thediagnostic LEDlights, theamplifier has aninternal fault.
2. Ifnot, plug theRCAcables back, andreset theamplifier. Ifit goes into diagnostic now, thefault lies in theinput, either withbadcables orsource unit.
3. If the amplifier seems fine with RCAcables plugged in, connect the speakers, one at a time, and if one of the speakers or its wiring is faulty, it will activate the diagnostic
system.
Amplifierheatsink overheating
Theamplifiers will shut downwhentheheatsink temperature reaches 80degrees centigrade, andturnback ononce theunit has cooled downbelow thatpoint.
Causesofoverheating:
1-Inadequatecooling - relocate or remount toprovide better natural airflow over thefins.
2 - Driving high power levels into low impedances - back off on the volume control, and/or make sure you are not loading the amplifier with less than the recommended
loudspeaker impedance.
Low outputpower
1-Check thatlevel controls have beenset upproperly.
2-Make sure thatthebattery voltage, as measured attheamplifier’s +12volt andgroundterminals, is 11volts or more.
3-Check all +12volt andgroundconnections.
Fusesblowing
1-Theuse ofloudspeaker impedances below therecommended minimums will drawmore current - check.
2-Ashort onthemain +12volt cable from thebattery tothevehicle chassis will cause themain fuse toblow.
3-Ifanamplifier fuse blows continually, withonly +12volt, groundandremote leads connected, theamplifier may befaulty.
Systemdoesnotturnon
1-Check all fuses.
2-Check all connections.
3 - Measure the +12 volt and remote turn on voltages at the amplifier terminals. If these are non existent or low, take voltage measurements at fuse holders, distribution
blocks, theheadunit’s +12volt andremote leads tolocalize theproblem.
Noiseproblems
System noise can bedivided into twocategories, hiss, andelectrical interference.
Hiss, orwhite noise
1 - High levels of white noise usually occurs when amplifier level controls are turned up too high - readjust according to the procedures in section ”Setting up systems after
installation forbest performance”
2-Anothermajor problem thatcan cause excessive hiss, is anoisy headunit -unplug theamplifier input RCAcables, andif thehiss level reduces, thesource unit is atfault.
Electricalinterference
The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition system, alternator, fuel pumps, air conditioners,
to mention just a few, create radiated electrical fields, as well as noise on the +12 volt supply and ground. Remember to isolate the problem - first unplug amplifier input RCA
cables, if thenoise is still present, check thespeaker leads, if not, plug theRCA’s back, andinvestigate thesource driving theamplifier, onecomponent atatime.
Atickingorwhine thatchangeswith engineRPM:
1-This problem could becaused by radiation pickup ofRCAcables tooneartoafuel pump or adistributor, forinstance, - relocate cables.
2-Check thattheheadunit groundis connected straight tothevehicle chassis, anddoes notuse factory wiring for ground.
3-Try tosupply theheadunit withaclean +12volt supply directly from thebattery +, instead ofusing asupply from thein dash wiring/fusebox.
Aconstantwhine:
This type ofnoise can bemore difficult topinpoint, butis usually caused by some kind ofinstability, causing oscillations in thesystem.
1-Check all connections, especially forgoodgrounds.
2-Make sure thatnospeaker leads areshorting toexposed metal onthevehicle chassis.
3-RCAcables arenotorious fortheir problematic nature, so check thatthese aregood, in particular theshield connections.
11
CRUNCH
Maxxsonics Limited Warranty
As the manufacturer of Maxxsonics, Autotek, Crunch, MB Quart and Hifonics car audio products,
Maxxsonics USA Inc. Warrants to the original consumer purchaser the amplifier to be free from
defects in material and workmanship for one (1) Year from date of purchase.
All other parts and accessories of the system are warrantied to be free from defects in
material and workmanship for one (1) year from date of purchase. Maxxsonics will
repair or replace at it’s option and free of charge during the warranty period, any system
component that proves defective in materials and workmanship under normal installation,
use and service provided that the product is returned to the authorized Maxxsonics dealer
from where it was purchased. A photo copy of the original receipt must accompany the
product being returned.
Valid purchase receipts will contain the name and address of the authorized reseller.
Any damage to the product as a result of misuse, abuse, accident, incorrect wiring,
improper installation, alteration of date code or bar code labels, revolution, natural
disaster, or any sneaky stuff because someone messed up, repair or alteration out side
of our factory or authorized service centers and any thing else you have done that you
should not have done is not covered.
This warranty is limited to defective parts and specifically excludes any incidental
or consequential damages connected therewith. This warranty is not to be construed
as an insurance policy.
Warranty on installation labor, removal, re-installation and freight charges are not the
responsibility of Maxxsonics USA Inc.
Warranty products damaged as a result of insufficient or improper packing materials
are not covered by this limited warranty and such damaged product will be returned
“as is” at the expense of the owner.
12
PART#: S1208
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