POWERCLASS™
PC1400 / PC1800 OWNER’S MANUAL
CONTENTS
(click on a topic to view)
CONGRATULATIONS
PC1800 ENDPLATE DIAGRAM
SPEAKER WIRING
PC1400 FEATURES / SPECIFICATIONS
PC1800 FEATURES / SPECIFICATIONS
QBASS
INPUTS
THERMAL MANAGEMENT
CROSSOVER/SUBSONIC/GAIN
PC1800 FREQUENCY CHART
PC1400 FREQUENCY CHART
SYSTEM DIAGRAM ONE
SYSTEM DIAGRAM TWO
TROUBLE SHOOTING
WARRANTY
QBASS PLUS
INSTALLATION
WIRING
WIRING (continued)
POWER / GROUND
POWER, GROUND, and REMOTE
PC1400 ENDPLATE DIAGRAM
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FEATURES / SPECIFICATIONS
1400
Adaptive MOSFET Switching Power Supply
Fully Complementary Triple Darlington Output Stage
2 Way Variable Crossover with Line Outputs
AP-III Protection Circuitry
TM
QBASS Bass Boost
Balanced Differential Input Stage
High Voltage Input Capability with Input Attenuation Switch
Gold Plated RCA Input and Output Connectors
PowerLock Speaker and Power Wire Connectors
Three Year Warranty when installed by an Authorized
PrecisionPower Dealer
Completely Designed And Handcrafted In The USA
Specifications
Power Bandwidth
Total Harmonic Distortion
Input Topology
Input Sensitivity
Input Impedance
Load Impedance
Supply Voltage
Damping Factor
Slew Rate
4.5 Hz - 100 kHz
0.02 %
Balanced Differential
120 mv - 12 volts RMS
10 k Ohms
2 - 8 Ohms
11 - 15 volts
>500
>50 V/µS
QBASS™
Up To +12dB Boost @ 40Hz
.7 Amps
Idle Current
Crossover
Hp/Lp 12dB/Octave Linkwitz-Riley
Variable 20-5kHz
Crossover Frequency
Continuous Output Power
PC1400
200 WRMS x 1 @ 4 ohms
400 WRMS x 1 @ 2 ohms
Dimensions
PC1400
Length - 11.75"
Height - 2.25"
Width - 8.9"
1
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FEATURES / SPECIFICATIONS
1800
Adaptive MOSFET Switching Power Supply
Fully Complementary Triple Darlington Output Stage
AM IV Protection Circuitry
QBASS PLUS™ Bass Boost
QBASS REMOTE™ Compatible
Advanced Buss Technology
Forced Air Thermal Management
Detented, Variable 24dB/Octave Low Pass Crossover
Detented, Variable 24dB/Octave Subsonic Filter
Balanced Differential Input Stage
High Voltage Input Capability with Input Attenuation Switch
Gold Plated RCA Input Connectors
PowerLock Speaker and Power Wire Connectors
Three Year Warranty when installed by an Authorized
PrecisionPower Dealer
Completely Designed And Handcrafted In The USA
Specifications
Power Bandwidth
Total Harmonic Distortion
Input Topology
4.5 Hz - 100 kHz
0.02 %
Differential
Input Sensitivity
Input Impedance
Load Impedance
Supply Voltage
Damping Factor
Slew Rate
150 mv - 12 volts RMS
10 k Ohms
2 - 8 Ohms
11 - 15 volts
>500
>50 V/µS
QBASS PLUS™
Frequency Centers
Idle Current
Up To +18dB Boost
30 Hz, 36 Hz, 44 Hz and 60 Hz
2 Amps
Crossover
LP, 24dB/Octave Linkwitz-Riley
50 Hz - 300 Hz
24dB/Octave
Crossover Frequency
Subsonic Filter
Subsonic Frequency
5 Hz - 50 Hz
Continuous Output Power
PC1800
400 WRMS x 1 @ 4Ω
800 WRMS x 1 @ 2Ω
Dimensions
PC1800
Length - 21.75
Height - 2.25"
Width - 8.9"
2
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QBASS™
QBASS™
On the PC1400 amplifier, we offer tremendous control
of your bass with QBASS™. On the front end panel of
your PC1400 you will find the QBASS™ level control.
Adjust the level control clockwise for up to 12dB of boost
at a factory preset frequency of 40Hz.
QBASS™
+12dB
+6dB
0
20Hz
40Hz
60Hz
80Hz
100Hz
CAUTION: QBASS™ should only be used in systems with
strong subwoofers. 12dB is a lot of bass boost and could
damage full range speakers.
3
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QBASS PLUS™
QBASS PLUS™
On the PC1800 amplifier, we've taken bass control
to a higher level with QBASS PLUS™. The two QBASS
switches (labeled 1 and 2) on the front end of the
amplifier allow you to select one of four frequency centers
30Hz, 36Hz, 44 Hz and 60 Hz. The Q SELECT switch
determines the width of boosted frequencies. A 'Q' of 2
(switch out) will give you a wide boost while a 'Q' of 4 will
boost a narrow range of frequencies. (See chart below.)
On the rear end panel you will find the QBASS™ level
control and the plug-in for an optional QBASS REMOTE™
dash mounted level control. Adjust the level control
clockwise for up to 18dB of boost at your selected
frequency and Q.
QBASS PLUS™
Q = 2
QBASS™ Settings
Q = 4
1
IN
IN
2
IN
OUT
IN
Freq.
30 Hz
36 Hz
44 Hz
60 Hz
+18dB
+12dB
+6dB
0dB
OUT
OUT
OUT
36Hz
44Hz
30Hz
60Hz
CAUTION: QBASS PLUS™ should only be used in systems with
strong subwoofers. 18dB is a lot of bass boost and could damage full
range speakers.
Optional QBASS REMOTE™
This boost control can be mounted in the
™
TE
REMO
dash and will supersede the boost
control on the endplate.
ASS
B
Q
Designed and handcrafted in the USA
Q
B
ASS
Optional QPORT™ expansion
™
module allows one boost control
to operate multiple amplifiers. Each
+18
QPORT™ has outputs for four amplifiers
as well as to another QPORT™ for greater
expansion. See your Authorized PrecisionPower Dealer
for more information!
4
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INSTALLATION
Tools/Parts needed for Installation (not supplied)
Small flat blade screwdriver
Phillips Screwdriver (#2 or medium sized)
Wire cutters
Wire strippers
4 - #6 round head screws, and 1 - #8 sheet metal screw
(or nut, bolt, and star washer)
2 - Ring connectors (large enough to accommodate your
method of grounding)
In-line fuse or circuit breaker - see fuse chart below
Power and ground wire - see Power Wire Calculator on page 4
Speaker wire - 16 gauge or larger
Grommets (sized to work with the power wire you plan to use
in your installation)
Tube of silicone sealant
Fuse requirements
Amplifier
PC1400
PC1800
Maximum Fuse Rating
35 Amp
100 Amp
You will need to install an in-line fuse or circuit breaker in
the power wire within 18" of the battery. This fuse or circuit
breaker is to protect your vehicle from fire in case the power
wire shorts to the vehicle body. If you are only using one
amplifier, use the fuse rating indicated in this chart. If you are
using more than one amplifier, add up the fuse ratings for all the
amplifiers. This sum is the rating for your main fuse or circuit
breaker.Use a power distribution block or fuse near your amplifiers
with the appropriate fuse for each individual power wire.
5
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WIRING
The following is a basic formula to be used as a guide to determine current
draw. A 50% amplifier efficiency rating is used as an average. Your new
™
POWERCLASS amplifier is more efficient, other amplifiers will probably
be less. This formula is to be used as a guideline. Using wire of a larger
gauge can only improve the current transfer of your system. Do not use
smaller gauge wire.
Total RMS output x 2 = Total Input Wattage
Total Input Wattage
= Current Draw (in Amps)
Supply Voltage
™
Example: A POWERCLASS 1800 amplifier has one channel at 400 watts
per channel RMS rating into 4 Ohms. You would use the formula in the
following way:
400W x 2 = 800W
800W
12V
= 66.6A Total current draw.
If the same amplifier is driven into a 2 ohm mono load, double it's 4 Ohm
™
RMS rating. All POWERCLASS amplifiers will effectively double their
power at this load.
400W x 2 x 2 = 1600W
1600W
12V
= 133.3A Total current draw.
If you are using more than one amplifier, add up the total current draw
for all of them and choose the appropriate gauge based on the grand total.
Power Wire Calculator
Recommended MINIMUM Gauge
Total Current Draw
Length Of Wire To Be Run
( in Amps)
Up to 4ft. 4 to 7ft. 7 to 10ft. 10 to 13ft. 13 to 16ft. 16 to 19ft. 19 to 22ft. 22 to 28ft.
0-20
20-35
35-50
50-65
65-85
85-105
105-125
125-150
14
12
10
8
6
6
12
10
8
8
6
6
4
2
12
8
8
6
4
4
4
2
10
8
6
4
4
2
2
2
10
6
6
4
2
2
2
0
8
6
4
4
2
2
0
0
8
6
4
4
2
2
0
0
8
4
4
2
0
0
0
00
4
2
(
NOTE: The ground wire should be the same gauge as the power wire.
6
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WIRING
Before beginning, disconnect the negative (-) terminal of the
battery prior to working on the positive (+) terminal to prevent
a short to ground. This is important, unless you want to spend
the rest of your life with a nickname like "Sparky," or "Smokey."
Reconnect the negative terminal only after all connections have
been made.
Factory Ground wire may
need to be replaced if it is
frayed or broken.
Positive
Battery
Terminal
Fuse must be
installed within
18" of battery
Run signal cables (RCAs)
and remote turn-on lead
down the opposite side of
the vehicle of the power
wire to avoid radiated noise.
Drill a hole in the firewall
and use a rubber grommet
to keep wire from shorting.
eject
1
5
2
6
3
7
4
8
Trk
1
DP
B
A
S
S
TREBLE
B
A
L
A
N
C
E
T
R
A
C
K
P
P
I
M
A
R
K
E
T
I
N
G
T
VOLUME
L
E
F
T
R
I
G
H
T
F
O
W
A
R
D
REVERSE
Run the cables under the
carpet near the side of the
vehicle. Be careful not to
drill or screw into the wires
when you replace the trim.
Avoid sharp edges that
could chafe through the
insulation.
For systems over 300 watts,
add a ground cable from the
amp to the battery
(see page 6).
Firmly attach Amp
Ground Wire to solid
metal (see page 6).
Warning!
Fuse must be installed within 18" of battery
7
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POWER / GROUND
Grounding
Locate an area near the amplifier(s) that is metal and clean
an area about the size of a quarter to bare metal. Inspect the
area around and underneath to be sure you won't drill into wires,
brake or fuel lines, etc. Drill a pilot hole in the middle of this
area.Terminate the ground wire with a ring connector and attach
it to the bare metal using a #8 sheet metal screw and washer
or preferably, a bolt, nut and a star washer (not supplied). We
suggest crimping and soldering this connection. After the
connection is complete, coat the area (on both sides) with
silicone or some similar material to prevent rust from
developing on the bare metal.
If your grand total current draw is over 50 amps (or total output
power is over 300 watts), you should run a ground wire beside
your power wire from the battery to the amplifier(s) in addition
to your regular ground wire. Keep the ground and power wires
as close together as possible, and use the same gauge wire
for both. This will ensure that you have a good ground path,
and may eliminate such potential problems as engine noise
and overheated amplifiers.
Charging System Considerations
If your grand total current draw is over 100 amps (or total output
power is over 600 watts), you are probably exceeding the
capability of your charging system. Dimming lights and
fluctuating voltage are solid indicators that you need to upgrade
your alternator, battery (or go to multiple batteries), or both.
Keep in mind that your amplifiers simply convert electrical
energy to acoustical energy, and any electrical deficiency will
compromise the performance of your sound system.
For more information about charging system upgrades, see
your local authorized PrecisionPower Dealer or call the
PrecisionPower technical support office at 1-800-62POWER.
8
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POWER / GROUND and REMOTE
Once you have run both the power and ground wires, it's time
to connect the cables to the amplifier. Cut off excess wire and,
using wire strippers, strip the ends of the power and ground
cables approximately 1/4 inch. Locate the PowerLock power
and ground connector (supplied). With a small flat bladed screw
driver, loosen the screws before attempting to insert the cables.
Insert the wires into the appropriate hole, and tighten the
screws. Once the wires are secure, the PowerLock may be
plugged into the amplifier. The Power/Ground PowerLock will
accommodate 4 gauge wire for the PC1400/PC1800.
Power/Ground PowerLock
Fastening screws
Connect to Amplifier
Power wires
Remote turn-on
Your head unit should have a lead marked 'remote' or 'power
antenna' which will be used to turn on your amplifier. Extend
this lead through your vehicle along with your RCA signal wires.
Strip 1/4 inch of insulation off the wire and insert the end into
the center terminal of the 5-pin speaker/remote PowerLock.
9
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ENDPLATE DIAGRAM
1400
1. INPUTS
Plug in the RCA leads from your head unit or crossover here (see page 13).
2. GAIN
3. -12dB
Use this control to match the output level of the head unit to the amplifier (see page 15).
For use with high level inputs (4V up to 12V). Push this switch
in to attenuate the input by 12dB (see page 13).
4. XOVER FREQ.
Detented control adjusts HP/LP crossover frequency from 20Hz to 5kHz (see pages 15 & 17).
5. HP/LP BUTTON
Push this switch in to activate the high pass crossover or out for lowpass signal to the
speakers.
6. QBASS™ Level
Turn this control clockwise to boost the QBASS™ circuit by up to 12dB.
7. RCA OUTPUTS
Provide either HP/LP signal to another amplifier. This signal will be HP if you've selected
LP for the speaker outputs, and vice versa.
8. SPEAKER/REMOTE CONNECTOR
After connecting remote and speaker wires, plug in the PowerLock connector here
9. COOLING VENTS.
10. POWER / GROUND PowerLock
After you have securely connected your power and ground wires, plug in the
Power / Ground PowerLock connector here (see page 9).
11. POWER indicator
A green light indicates that the amplifier is on.
1
2
3
4
5
6
9
8
7
10
11
10
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ENDPLATE DIAGRAM
1800
1. INPUTS
Plug in the RCA leads from your head unit or crossover here (see page 13).
2. GAIN
Use this control to match the output level of the head unit to the amplifier (see page 15).
3. SUBSONIC FREQ.
This is used to control the detented subsonic filter from 5Hz to 50Hz (see pages 15 & 16 ).
4. LOWPASS FREQ.
Detented control adjusts LP crossover frequency from 50Hz to 300Hz (see pages 15 & 16 ).
5. SUBSONIC ON/OFF
Push this switch in to activate the subsonic filter (see page 15 ).
6. LOWPASS ON/OFF
Push this switch in to activate the LP crossover (see page 15 ).
7. Q SELECT 4/2
Push this button in for a Q setting of 4 and out for a setting of 2 (see page 4).
8. SPEAKER/REMOTE CONNECTOR
After connecting remote and speaker wires, plug in the PowerLock
connector here (see page 12).
9. FORCED AIR EXHAUST VENTS (see page 14).
10. -12dB
For use with high level inputs (4V up to 12V). Push this switch
in to attenuate the input by 12dB (see page 13).
11. QBASS 1
Use this switch with the QBASS 2 to program the QBASS PLUS™ circuit. (see page 4).
12. QBASS 2
Use this switch with the QBASS 1 to program the QBASS PLUS™ circuit. (see page 4).
13. FORCED AIR INTAKE VENTS (see page 14).
14. QBASS™ Level
Turn this control clockwise to boost the QBASS PLUS™ circuit by up to 18dB.
15. QBASS REMOTE™ plug in
Plug in the data cable from the optional QBASS REMOTE™ dash mount level control here.
(This will bypass the amplifier's on board QBASS control)
16. POWER / GROUND PowerLock
After you have securely connected your power and ground wires, plug in the
Power / Ground PowerLock connector here (see page 9).
17. POWER / MUTE indicator
A green light indicates that the amplifier is on, a red light indicates that the amplifier's
muting circuits have been engaged.
1
2
3
4
5
6
8
9
7
13
14
10
12
11
16
15
17
11
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SPEAKER WIRING
Using 14 gauge or larger, run the speaker wires from the amplifier
location through the vehicle to the speakers. Observe the same
precautions for routing these wires that you followed for running
the power and remote turn-on wires. Locate the speaker/remote
turn-on PowerLock connector.
Speaker PowerLock Connector
Right Speaker negative
Right Speaker positive
Remote turn on
Left Speaker positive
Left Speaker negative
Speaker/Remote PowerLock
Although the PC1400/PC1800 is a mono amplifier, you will notice
that there are two 'speaker negative' and two 'speaker positive'
terminals as well as the 'remote turn-on' terminal.The two pairs of
speaker terminals are parallel with each other, so you can use
one each of the positive and negative, or you can use both sets
for two speakers. Cut off excess and, using wire strippers, strip 1/
4 inch of insulation. Loosen the appropriate screws on the
underside of the connector, and insert the speaker leads into the
end. Check to be sure you've maintained proper polarity before
securing each wire, then plug the PowerLock connector into the
amplifier with the screws facing down.
12
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INPUTS
There is a pair of RCA inputs on the front end of your amplifier.
The RCA cables from your head unit or crossover plug in here.
If your head unit doesn't have RCA outputs don't worry. Simply
add a set of RCA plugs (available at your dealer) to your front
or rear set of speaker leads (see drawing below), plug them
into the input jacks, and push in the -12dB input attenuation
switch.
SOURCE Headunit
eject
1
5
2
6
3
7
4
8
Trk 1
BASS
TREBLE
PPI MAR KET ING DPT
BALANCE
TRACK
VOLUME
LEFT
RIGHT
FOWARD
REVERSE
(+) Positive
LEFT input
(-) Negative
(+) Positive
RIGHT input
(-) Negative
WARNING: If you are using a source unit with bridged high powered (or
"floating ground") speaker outputs, a suitable high to low level adapter
must be used. If you are unsure about your head unit see your local
PrecisionPower dealer or call 1-800-62Power.
Balanced Differential Inputs
This circuitry reduces noise radiated into your
signal cables by up to 40dB. This is equivalent to a noise
reduction of approximately one hundred times what the noise
level would be without this circuitry. It provides all the benefits
of a true 'balanced' line without the need of any special cables
(see diagram below). This type of input works with any
conventional RCA cable.
music
noise
(+)
(
+
=)
( )
signal and ground
music noise
music
and noise
music
noise
noise
(+)
( )
(
-
= 0 )
noise cancels
music
NO noise
13
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THERMAL MANAGEMENT
Heatsink Cooling
The unique heatsink on
™
your POWERCLASS
amplifier has been
designed with fins on the
inside of the aluminum
mass. This allows for the
transfer of heat from the
circuitry to the heatsink fins and out through the vents in the
endplates. Be sure you have ample space around the amplifier
for cooling, at least 2" on all sides.
Forced Air Thermal Management
To manage the additional heat associated with higher output
capability, a thermally controlled fan has been designed into
the PC1800. When the heatsink temperature reaches a
predetermined value, the fan is activated and cool air is
drawn in through the lower intake vents on the endplate.
This cool air flows below the circuit
board, through the fan and across
the internal fins, cooling the
heatsink. The warm air is
then forced out through
the upper endplate
exhaust vents.
Cool Air Intake
Warm Air Exhaust
14
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CROSSOVER, SUBSONIC and GAIN
Crossover
PC-1400
Your new Monoblock amplifier has a variable 20-5kHz 12dB/Octave HP/
LP crossover. When you select the LP feature on this amplifier you have
made the output RCA's HP, and vice versa when you select HP for the
speaker output.
PC-1800
The PC-1400 has a variable fourth-order Linkwitz-Riley type, 24dB per
octave LP crossover built in to provide system flexibility without the added
expense and installation of an outboard crossover. The speaker outputs of
the amplifier are all pass or LP according to the LP ON/OFF switch on the
amplifier's front endplate.You would choose LP (switch in) to use this amp
for subwoofers, or choose all pass (switch out) to use this amp for full
range speakers. Selection of low pass lets you vary the crossover point
from 50Hz to 300Hz using the detented LP FREQ. control, 50Hz being
fully counterclockwise. (see frequency detent charts on pg.16 )
Subsonic Filter
You will also find the SUBSONIC ON/OFF switch on the front endplate of
your PC-1800. This is a 24dB per octave HP crossover used to clean up
the sound of your subwoofers, and is especially useful with ported or
bandpass sub enclosures with steeper rolloffs at low frequencies. With
the Subsonic filter switch in, you can vary the HP frequency from 5Hz
to 50Hz using the detented SUBSONIC FREQ. control, 5Hz being fully
counterclockwise. Refer to the Frequency Chart on page 13 to set your
frequency or adjust the filter to the lowest frequency and turn the control
clockwise as the music plays. You will notice increased detail to a point
and then you will notice a decrease in bass. Turn back to the detent
frequency just before you started losing bass.
Adjusting The Amplifier Input Gain
1. Adjust all amplifier input gain controls to just above minimum
sensitivity (fully counterclockwise).
2. Using the cleanest source (CD), with music playing turn up
the head unit until you can hear distortion. Now turn it down a
bit until you cannot hear the distortion.
3. Increase the Amplifier gain (clockwise) until the onset of
audible distortion. Then decrease the gain to the point just
before the distortion starts. This setting minimizes background
noise and prevents overload.
4. Repeat step 3 for any remaining amplifiers in the system.
15
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FREQUENCY CHART
PC1800
All crossover frequency controls are detented for improved performance. Each "click"
counted from the full counterclockwise position corresponds to a specific frequency.
Refer to this chart and page 12 for set-up instructions.
DETENT
SUBSONIC
LOW PASS
1
2
3
4
5
6
7
8
4.86 Hz
4.86 Hz
4.86 Hz
4.93 Hz
5.08 Hz
5.30 Hz
5.58 Hz
5.88 Hz
6.20 Hz
6.66 Hz
7.07 Hz
7.67 Hz
8.32 Hz
9.15 Hz
10.04 Hz
11.20 Hz
12.72 Hz
14.04 Hz
15.15 Hz
16.30 Hz
17.70 Hz
19.31 Hz
21.25 Hz
23.87 Hz
27.04 Hz
31.76 Hz
33.40 Hz
34.90 Hz
36.50 Hz
38.20 Hz
40.00 Hz
41.62 Hz
42.87 Hz
43.87 Hz
45.00 Hz
46.00 Hz
47.25 Hz
48.37 Hz
49.20 Hz
49.40 Hz
49.40 Hz
47.62 Hz
47.62 Hz
48.62 Hz
50.20 Hz
52.80 Hz
55.60 Hz
58.80 Hz
62.00 Hz
65.60 Hz
69.40 Hz
74.00 Hz
78.80 Hz
84.75 Hz
91.25 Hz
99.25 Hz
109.37 Hz
117.50 Hz
122.80 Hz
131.60 Hz
140.00 Hz
148.80 Hz
159.60 Hz
172.50 Hz
187.50 Hz
206.87 Hz
215.62 Hz
223.12 Hz
229.37 Hz
237.50 Hz
243.75 Hz
251.00 Hz
255.00 Hz
258.00 Hz
262.00 Hz
266.00 Hz
270.00 Hz
274.00 Hz
277.00 Hz
278.00 Hz
278.00 Hz
300.00 Hz
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
16
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FREQUENCY CHART
PC1400
The crossover frequency control is detented for improved performance. Each "click"
counted from the full counterclockwise position corresponds to a specific frequency.
Refer to this chart and page 15 for set-up instructions.
DETENT
XOVER FREQ
1
2
20 Hz
21 Hz
3
4
5
21 Hz
21.5 Hz
22Hz
6
7
8
23 Hz
24.5 Hz
26 Hz
9
27.5 Hz
30 Hz
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
32 Hz
35 Hz
39 Hz
43 Hz
49 Hz
56 Hz
64 Hz
73 Hz
80 Hz
88 Hz
100 Hz
114 Hz
134 Hz
160 Hz
196 Hz
260Hz
320 Hz
368 Hz
432 Hz
496 Hz
608 Hz
752 Hz
864 Hz
1008 Hz
1200 Hz
1488 Hz
1952 Hz
2816 Hz
4512 Hz
4944 Hz
5000 Hz
17
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SYSTEM DIAGRAM
ONE
Source Unit
eject
1
2
3
4
5
6
7
8
Trk
1
BASS
TREBLE
BALANCE
TRACK
P
P
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A
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K
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VOLUME
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RIGHT
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PAR-245 Preamp/Equalizer
In
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Passive
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Crossover
Tweeter
Tweeter
MidRange
MidRange
™
POWERCLASS Amplifier
Four Channel Amplifier
Variable High Pass
™
POWERCLASS Amplifier
PC1400/PC1800
Variable Low Pass
Variable Subsonic
Subwoofer
Subwoofer
18
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SYSTEM DIAGRAM
TWO
Source Unit
eject
1
2
3
4
Trk 1
5
6
7
8
BASS
TREBLE
BALANCE
TRACK
P
P
I
M
A
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K
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T
I
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D
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VOLUME
LEFT
RIGHT
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R
In
pu
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R
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FRX-456 Crossover
LEFT CHANNEL
High Pass Frequencies
RIGHT CHANNEL
High Pass Frequencies
Passive
Crossover
Passive
Crossover
Tweeter
Tweeter
MidRange
MidRange
™
™
POWERCLASS Amplifier
POWERCLASS Amplifier
PC1400/PC1800 LOWPASS OFF
PC1400/PC1800 LOWPASS OFF
Low Pass Frequencies
™
POWERCLASS Amplifier
PC1400/PC1800 LOWPASS OFF
Subwoofer
Subwoofer
19
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TROUBLE SHOOTING
NO SOUND
Is the LED lit?
YES
NO
Check Power and Remote turn-on wire
for voltage. Make sure Ground wire is
secure.
PC 1800 ONLY
WHAT COLOR ?
GREEN
RED
Substitute RCA inputs with another
source, and connect a known good
speaker to the output.
Central Muting is engaged. Remote
turn-on wire must have more than 8
volts to release central muting. Check
Remote turn-on at the head unit.You
may need to install a relay if the head
unit doesn't put out sufficient voltage.
STILL NO SOUND - See your Authorized PrecisionPower Dealer or Call:
1-800-62POWER
AMPLIFIER PROTECTION
PC-1400
Both excessive temperature and low impedance (or short circuit)
conditions will activate the amplifier's AP-III protection circuitry, which
turns off the amplifier's output.
PC-1800
Both excessive temperature and low impedance (or short circuit)
conditions will activate the amplifier's AM-IV protection circuitry turns
down the amplifier's output.
When the amplifier cools down, or the impedance is corrected, both
protection circuits will restore full power. If your amp is turning off/down
check your speakers and wiring for low impedance and short circuits.
Also, ensure that there is nothing blocking the normal convective airflow
of the amplifier. No obstruction should be within 2" of the amplifier on all
sides.
NOTE: Low battery voltage will cause the amplifier to run warmer.
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WARRANTY
Three-Year Limited U.S.A. Warranty
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state. PrecisionPower warrants its products to be free from defects in materials and
workmanship under normal use and service for a period of three (3) years from the date of
original purchase when the unit is installed by an Authorized Dealer. Non-Authorized Dealer
installed products carry a one (1) year parts and ninety (90) days labor limited warranty. The
extent and conditions of Limited Warranty are as follows:
1. Authorized Dealer Installed Products:PrecisionPower will either repair or replace at no charge,
to the original purchaser, any unit which PrecisionPower’s examination discloses to be defective
and under warranty, provided the defect occurs within three (3) years from the date of original
purchase when the unit is installed by an Authorized Dealer and the product is returned immedi-
ately to PrecisionPower. This warranty is not transferable.
2. Non-Authorized Dealer Installed Products: PrecisionPower will either repair or replace at no
charge, to the original purchaser, any unit which PrecisionPower’s examination discloses to be
defective and under warranty, provided the defect occurs within ninety (90) days from the date of
purchase and the product is returned immediately to PrecisionPower. Warranty claims beyond
ninety (90) days for Non-Authorized Dealer Installed Products will be for parts only and will
extend for one (1) year from the date of purchase. This warranty is not transferable.
3. The date of purchase and proof of Authorized Dealer Installation of a PrecisionPower product
must be established by an original sales receipt which must accompany the article being re-
turned for warranty work.
4. This warranty shall NOT apply to any PrecisionPower product found to have the original fac-
tory serial number removed or defaced. All products received (by PrecisionPower) for in war-
ranty or out of warranty repair, with their original serial numbers removed or defaced, will NOT be
repaired and will be returned to sender, freight collect. Refer to original packaging for the serial
number of your component speakers.
5. The provisions of this warranty shall not apply to any PrecisionPower product used for a
purpose for which it is not designed, which has been repaired or altered in any way, or which has
been connected, installed, or adjusted other than in accordance with the instructions furnished in
PrecisionPower’s owner’s manual. Nor shall this warranty apply to any part which has been
subject to misuse, neglect, or accident.
6. PrecisionPower does not authorize any other persons to assume any other liability in connec-
tion with its products. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BY
PRECISIONPOWER APPLICABLE TO ITS PRODUCTS. ANY IMPLIED WARRANTY OR MER-
CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE APPLICABLE TO
PRECISIONPOWER PRODUCTS IS LIMITED IN DURATION TO THE DURATION OF THIS
LIMITED WARRANTY. PRECISIONPOWER SHALL NOT BE LIABLE FOR THE INCIDENTAL,
CONSEQUENTIAL, OR COMMERCIAL DAMAGES RESULTING FROM THE BREACH OF THIS
WRITTEN WARRANTY. Some states or provinces do not allow the exclusion or limitation of
incidental or consequential damages or limitations on how long an implied warranty lasts; so the
above limitations or exclusions may not apply to you.
7.Your product will be serviced on an in-warranty basis within the warranty period for the correc-
tion of warranted defects. If improper operation of your PrecisionPower product should occur,
contact your Authorized Dealer for assistance with the return and factory repair of your
PrecisionPower
product. If an Authorized Dealer is not available, return the unit including your name, telephone
number, return address, a copy of your sales receipt, and a description of the problem to:
PrecisionPower,Inc.
Service Department
4829 S. 38th Street
Phoenix, AZ 85040-2964
TO RETURN PRECISIONPOWER PRODUCTS OUT OF WARRANTY: Return the unit, postage
prepaid, in the original protective carton. Please include a description of the problem and, if
desired, a request for an estimate of repair costs. Unless a request for an estimate is included,
the unit will be repaired as necessary. Please contact PrecisionPower Customer Service at 1-
800-62-POWER for questions concerning out of warranty repair charges. Repaired unit will be
returned with an itemized statement, C.O.D.
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