POWERCLASS
PC1400 / PC1800 OWNER’S MANUAL
™
CONTENTS
(click on a topic to view)
CONGRATULATIONS
PC1400 FEATURES / SPECIFICATIONS
PC1800 FEATURES / SPECIFICATIONS
QBASS
QBASS PLUS
INSTALLATION
WIRING
WIRING (continued)
POWER / GROUND
POWER, GROUND, and REMOTE TROUBLE SHOOTING
PC1800 ENDPLATE DIAGRAM
SPEAKER WIRING
INPUTS
THERMAL MANAGEMENT
CROSSOVER/SUBSONIC/GAIN
PC1800 FREQUENCY CHART
PC1400 FREQUENCY CHART
SYSTEM DIAGRAM ONE
SYSTEM DIAGRAM TWO
PC1400 ENDPLATE DIAGRAM WARRANTY
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for choosing
proudly design, engineer and manufacture audio products at our facility in
Phoenix, Arizona. Our award winning engineering team utilizes innovative
technology to consistently deliver
sound quality, reliability, and value. This
our commitment to offer you unpar alleled versatility and quality for years of
dependable service and listening enjoyment.
PrecisionPower
audio epuipment. At
Absolutely State of the Art
PrecisionPower
PrecisionPower
TM
performance,
product reflects
we
Service
Do not attempt to service
Performing exploratory surgery on your audio equipment yourself
will void the warranty. Many parts of your
are custom built to our specifications. Our factory parts are not
made available to anyone else nor are they for sale. Our goal
is to make sure that your
sound as good as the day it was purchased. Contact your
authorized
service through
PrecisionPower
PrecisionPo wer
PrecisionPower
PrecisionPower
dealer about obtaining any warranty
.(See Warranty insde back cover)
products yourself.
PrecisionPower
product will always
gear
FOR YOUR RECORDS:
Model
Serial Number
Purchase Date
Caution!
The extended use of a high powered audio system may
result in hearing loss or damage. While
systems are capable of
incredible accuracy, they are also designed for you to
enjoy at more reasonable levels all of the sonic subtleties
created by musicians. Please observe all local sound
ordinances.
"Concert Level"
PrecisionPower
volumes with
BACK TO CONTENTS
Adaptive MOSFET Switching Power Supply
Fully Complementary Triple Darlington Output Stage
2 Way Variable Crossover with Line Outputs
AP-III
Protection Circuitry
QBASSTM
Balanced Differential Input Stage
High Voltage Input Capability with Input Attenuation Switch
Gold Plated RCA Input and Output Connectors
PowerLock
Three Year Warranty when installed by an Author ized
PrecisionPower
Completely Designed And Handcrafted In The USA
Specifications
Power Bandwidth 4.5 Hz - 100 kHz
Total Harmonic Distortion 0.02 %
Input Topology Balanced Differential
Input Sensitivity 120 mv - 12 volts RMS
Input Impedance 10 k Ohms
Load Impedance 2 - 8 Ohms
Supply Voltage 11 - 15 volts
Damping Factor >500
Slew Rate >50 V/µS
QBASS™ Up To +12dB Boost @ 40Hz
Idle Current .7 Amps
Crossover Hp/Lp 12dB/Octave Linkwitz-Riley
Crossover Frequency Variable 20-5kHz
FEATURES / SPECIFICATIONS
1400
Bass Boost
Speaker and Power Wire Connectors
Dealer
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
BACK TO CONTENTS
Adaptive MOSFET Switching Power Supply
Fully Complementary Triple Darlington Output Stage
AM IV
Protection Circuitry
QBASS PLUS
QBASS REMOTE
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
Three Year Warranty when installed by an Author ized
PrecisionPower
Completely Designed And Handcrafted In The USA
Specifications
Power Bandwidth 4.5 Hz - 100 kHz
Total Harmonic Distortion 0.02 %
Input Topology Differential
Input Sensitivity 150 mv - 12 volts RMS
Input Impedance 10 k Ohms
Load Impedance 2 - 8 Ohms
Supply Voltage 11 - 15 volts
Damping Factor >500
Slew Rate >50 V/µS
QBASS PLUS™ Up To +18dB Boost
Frequency Centers 30 Hz, 36 Hz, 44 Hz and 60 Hz
Idle Current 2 Amps
Crossover LP, 24dB/Octave Linkwitz-Riley
Crossover Frequency 50 Hz - 300 Hz
Subsonic Filter 24dB/Octave
Subsonic Frequency 5 Hz - 50 Hz
FEATURES / SPECIFICATIONS
1800
™
Bass Boost
™
Compatible
Speaker and Power Wire Connectors
Dealer
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
BACK TO CONTENTS
QBASS
™
QBASS
On the
of your bass with
your
Adjust the level control clockwise for up to 12dB of boost
at a factory preset frequency of 40Hz.
+12dB
+6dB
0
20Hz
™
PC1400
PC1400
amplifier, we offer tremendous control
Q
BASS
you will find the
40Hz 60Hz 80Hz 100Hz
™
. On the front end panel of
QBASS
Q
™
BASS
™
level control.
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
BACK TO CONTENTS
QBASS PLUS
™
QBASS PLUS
On the
™
PC1800
to a higher level with
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 char t below.)
On the rear end panel you will find the
control and the plug-in for an optional
dash mounted level control. Adjust the level control
clockwise for up to 18dB of boost at your selected
frequency and Q.
QBASS™
1 2 Freq.
IN IN 30 Hz
IN OUT 36 Hz
OUT IN 44 Hz
OUT OUT 60 Hz
Settings
amplifier, we've taken bass control
™
. The two
Q
Q
BASS REMO TE
Q
BASS PLUS
Q = 2
36Hz
BASS
44Hz
Q
™
™
BASS
level
60Hz
+18dB
+12dB
+6dB
0dB
Q
BASS PLUS
Q = 4
30Hz
™
CAUTION:
strong subwoofers. 18dB is a lot of bass boost and could damage full
range speakers.
Optional
Q
BASS PLUS
Q
BASS REMOTE
This boost control can be mounted in the
dash and will supersede the boost
control on the endplate.
Optional
Q
PORT
™
expansion
module allows one boost control
to operate multiple amplifiers. Each
Q
PORT
™
has outputs for four amplifiers
as well as to another
expansion. See your Authorized
™
should only be used in systems with
™
BASS REMOTE
Q
QBASS
™
0
+18
Q
PORT
™
for greater
PrecisionPower
™
Designed and handcrafted in the USA
Dealer
for more information!
4
BACK TO CONTENTS
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 Maximum Fuse Rating
PC1400
PC1800
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 vehic le from fire in case the po wer
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 po wer distribution block or fuse near y our amplifiers
with the appropriate fuse for each individual power wire.
5
35 Amp
100 Amp
BACK TO CONTENTS
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
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
™
amplifier is more efficient, other amplifiers will probably
Total Input Wattage
Supply V oltage
Example: A
POWERCLASS
= Current Draw (in Amps)
™
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
= 66.6A Total current draw.
12V
If the same amplifier is driven into a 2 ohm mono load, double it's 4 Ohm
RMS rating. All
POWERCLASS
power at this load.
400W x 2 x 2 = 1600W
1600W
= 133.3A Total current draw.
12V
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
™
amplifiers will effectively double their
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 14 12 12 10 10 8 8 8
20-35 12 10 8 8 6 6 6 4
35-50 10 8 8 6 6 4 4 4
50-65 8 8 6 4 4 4 4 2
65-85 6 6 4 4 2 2 2 0
85-105 6 6 4 2 2 2 2 0
105-125 4 4 4 2 2 0 0 0
125-150 2 2 2 2 0 0 0 00
(
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 nic kname lik e
"Sparky,"
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.
Run signal cables (RCAs)
and remote turn-on lead
down the opposite side of
the vehicle of the power
wire to avoid radiated noise.
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BASS
TREBLE
MARKET
PPI
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RIGHT
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REVERSE
LEFT
or
Positive
Battery
Terminal
Fuse must be
installed within
18" of battery
Drill a hole in the firewall
and use a rubber grommet
to keep wire from shorting.
"Smokey."
Avoid sharp edges that
could chafe through the
insulation.
Warning!
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.
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).
Fuse must be installed within 18" of battery
7
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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.
POWER / GROUND
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
PrecisionPower
technical support office at
8
Dealer or call the
1-800-62POWER
BACK TO CONTENTS
.
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
plugged into the amplifier. The Power/Ground
accommodate 4 gauge wire for the
PowerLock
may be
PowerLock
PC1400/PC1800
will
.
Power wires
Remote turn-on
Connect to Amplifier
Power/Ground
Fastening screws
PowerLock
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
9
PowerLock.
BACK TO CONTENTS
ENDPLATE DIAGRAM
1. INPUTS
2. GAIN
3. -12dB
4. XOVER FREQ.
5. HP/LP BUTTON
6. QBASS™ Level
7. RCA OUTPUTS
8. SPEAKER/REMOTE CONNECTOR
9. COOLING VENTS.
10. POWER / GROUND
11. POWER indicator
Plug in the RCA leads from your head unit or crossover here (see page 13).
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).
Detented control adjusts HP/LP crossover frequency from 20Hz to 5kHz (see pages 15 & 17).
Push this switch in to activate the high pass crossover or out for lowpass signal to the
Tur n this control clockwise to boost the
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.
After connecting remote and speaker wires, plug in the
After you have securely connected your power and ground wires, plug in the
Power / Ground
A green light indicates that the amplifier is on.
speakers.
PowerLock
PowerLock
1400
™
Q
BASS
circuit by up to 12dB.
PowerLock
connector here (see page 9).
connector here
1 2 3 4 5 6
10
9
8
7
10
11
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ENDPLATE DIAGRAM
1. INPUTS
2. GAIN
3. SUBSONIC FREQ.
4. LOWPASS FREQ.
5. SUBSONIC ON/OFF
6. LOWPASS ON/OFF
7. Q SELECT 4/2
8. SPEAKER/REMOTE CONNECTOR
9. FORCED AIR EXHAUST VENTS (see page 14).
10. -12dB
11. QBASS 1
12. QBASS 2
13. FORCED AIR INTAKE VENTS (see page 14).
14. QBASS™ Level
15. QBASS REMOTE™ plug in
16. POWER / GROUND PowerLock
17. POWER / MUTE indicator
Plug in the RCA leads from your head unit or crossover here (see page 13).
Use this control to match the output level of the head unit to the amplifier (see page 15).
This is used to control the detented subsonic filter from 5Hz to 50Hz (see pages 15 & 16 ).
Detented control adjusts LP crossover frequency from 50Hz to 300Hz (see pages 15 & 16 ).
Push this switch in to activate the subsonic filter (see page 15 ).
Push this switch in to activate the LP crossover (see page 15 ).
Push this button in for a Q setting of 4 and out for a setting of 2 (see page 4).
After connecting remote and speaker wires, plug in the PowerLock
connector here (see page 12).
For use with high level inputs (4V up to 12V). Push this switch
in to attenuate the input by 12dB (see page 13).
Use this switch with the QBASS 2 to program the QBASS PLUS™ circuit. (see page 4).
Use this switch with the QBASS 1 to program the QBASS PLUS™ circuit. (see page 4).
Turn this control clockwise to boost the QBASS PLUS™ circuit by up to 18dB.
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)
After you have securely connected your power and ground wires, plug in the
Power / Ground PowerLock connector here (see page 9).
A green light indicates that the amplifier is on, a red light indicates that the amplifier's
muting circuits have been engaged.
1800
14
1 2 3
15
4 5 6
10
11
11
12
9
8
7
17
13
16
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SPEAKER WIRING
Using 14 gauge or larger, run the speak er 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
Speaker
PowerLock
Power
Lock
Connector
Right Speaker negative
Right Speaker positive
Remote turn on
Left Speaker positive
Left Speaker negative
connector.
Speaker/Remote
PowerLock
Although the
PC1400/PC1800
is a mono amplifier, y ou will notice
that there are two 'speaker negative' and two 'speaker positive'
terminals as well as the 'remote turn-on' terminal. The tw o 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 speak ers. 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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t
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 hav e 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
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WARNING:
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(+) Positive
LEFT input
(-) Negative
(+) Positive
RIGHT inpu
(-) Negative
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
signal and ground
music
noise
noise
noise
(+)
( + =)
( )
music noise
(+)
( - = 0 )
( )
noise cancels
13
music
and noise
music
NO noise
BACK TO CONTENTS
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.
Warm Air Exhaust
Cool Air Intake
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 crossov er . The speak er 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
BACK TO CONTENTS
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 LOW PASSSUBSONIC
1 4.86 Hz 47.62 Hz
2 4.86 Hz 47.62 Hz
3 4.86 Hz 48.62 Hz
4 4.93 Hz 50.20 Hz
5 5.08 Hz 52.80 Hz
6 5.30 Hz 55.60 Hz
7 5.58 Hz 58.80 Hz
8 5.88 Hz 62.00 Hz
9 6.20 Hz 65.60 Hz
10 6.66 Hz 69.40 Hz
1 1 7.07 Hz 74.00 Hz
12 7.67 Hz 78.80 Hz
13 8.32 Hz 84.75 Hz
14 9.15 Hz 91.25 Hz
15 10.04 Hz 99.25 Hz
16 11.20 Hz 109.37 Hz
17 12.72 Hz 117.50 Hz
18 14.04 Hz 122.80 Hz
19 15.15 Hz 131.60 Hz
20 16.30 Hz 140.00 Hz
21 17.70 Hz 148.80 Hz
22 19.31 Hz 159.60 Hz
23 21.25 Hz 172.50 Hz
24 23.87 Hz 187.50 Hz
25 27.04 Hz 206.87 Hz
26 31.76 Hz 215.62 Hz
27 33.40 Hz 223.12 Hz
28 34.90 Hz 229.37 Hz
29 36.50 Hz 237.50 Hz
30 38.20 Hz 243.75 Hz
31 40.00 Hz 251.00 Hz
32 41.62 Hz 255.00 Hz
33 42.87 Hz 258.00 Hz
34 43.87 Hz 262.00 Hz
35 45.00 Hz 266.00 Hz
36 46.00 Hz 270.00 Hz
37 47.25 Hz 274.00 Hz
38 48.37 Hz 277.00 Hz
39 49.20 Hz 278.00 Hz
40 49.40 Hz 278.00 Hz
41 49.40 Hz 300.00 Hz
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
1 20 Hz
2 21 Hz
3 21 Hz
4 21.5 Hz
5 22Hz
6 23 Hz
7 24.5 Hz
8 26 Hz
9 27.5 Hz
10 30 Hz
1 1 32 Hz
12 35 Hz
13 39 Hz
14 43 Hz
15 49 Hz
16 56 Hz
17 64 Hz
18 73 Hz
19 80 Hz
20 88 Hz
21 100 Hz
22 114 Hz
23 134 Hz
24 160 Hz
25 196 Hz
26 260Hz
27 320 Hz
28 368 Hz
29 432 Hz
30 496 Hz
31 608 Hz
32 752 Hz
33 864 Hz
34 1008 Hz
35 1200 Hz
36 1488 Hz
37 1952 Hz
38 2816 Hz
39 4512 Hz
40 4944 Hz
41 5000 Hz
XOVER FREQ
17
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SYSTEM DIAGRAM
0
ONE
Source Unit
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Tweeter
MidRange
Tweeter
MidRange
PAR-245
Preamp/Equalizer
Passive
Crossover
Passive
Crossover
POWER
CLASS™
Four Channel Amplifier
Precision
PAR-245
Volume
Power
Power
F
In-Clip
R
Fader
Defeat
Sub Low Low-Mid
Amplifier
Variable High Pass
R
Input
L
Input Sensitivity
1
2
3
4
Sub Low Low-Mid Treble
Made in USA
++++
+
High-Mid
Treble
PAR-245
R
Rear
Output
L
R
Front
Output
L
LED Select
Pow
er
Frequency Adjust
High-Mid
Passive
Crossover
Tweeter
MidRange
Passive
Crossover
Tweeter
MidRange
POWER
CLASS™
Amplifier
PC1400/PC180
Variable Low Pass
Variable Subsonic
Subwoofer
Subwoofer
18
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PAR-245
PMQ-210
Ten Band Parametric EQ
Preamp/Equalizer
FRX-456
SYSTEM DIAGRAM
TWO
Source Unit
eject
123
4
Trk 1
5
876
BASS
TREBLE
MARKET
PPI
ING DPT
BALANCE
TRACK
VOLUME
RIGHT
FOWARD
REVERSE
LEFT
R
Input
L
R
Input Sensitivity
R
ear
O
utput
L
R
Front
Output
L
LED Select
Precision
PAR-245
Volume
Power
F
In-Clip
R
Fader
Defeat
Input
attenuation
Output
-12dB in
stereo•out
mono•in
L
R
R
L
Precision
Inputs
L
L
combined
inputs • in
R
R
rear
Crossover
Power
Sub Low Low-Mid
Precision
PMQ-210
Pow
FRX-456
front
1
2
3
4
Sub Low
Low-Mid
Made in USA
++++
+
High-Mid
Treble
PAR-245
80Hz-260Hz
40Hz-130Hz
HL
20Hz-70Hz
HL
Q
Power
Power
Ground
Remote
Power
272
172
92
118
70
er
36
25
264
16
22
10
P
w
o
+
46
L
7
_
ic
n
o
+10
S
b
u
S
in
a
∞
ss G
a
Subwoofer
P
w
o
L
er
Pow
Precision
Ground
Remote
Power
Pow
er
Frequency Adjust
High-Mid
Treble
14KHz-23.37KHz
HL
Q
9.37KHz-15.75KHz
HL
41.5
4KHz-9.37KHz
Q
HL
Cut / Boost
41.5
1.95KHz-4.5Khz
940Hz-1.25KHz
HL
330Hz-1KHz
Q
HL
160Hz-550Hz
Q
HL
41.5
Q
HL
41.5
Cut / Boost
Q
41.5
Cut / Boost
Q
41.5
-12db
Cut / Boost
+12db
41.5
-12db
Cut / Boost
+12db
-12db
Cut / Boost
+12db
EQ
-12db
Defeat
Power
Precision
USA
Made in
Four/Five/Six Way Electronic Crossover
+
_
752
344
l
ve
e
ill L
r F
a
152
e
R
344
7.4K
192
r
80
te
e
e
w
112
T
752
1.77K
344
e
80
g
n
a
Rear
R
152
id
M
344
7.4K
192
80
r
te
e
e
112
w
T
1.77K
80
e
g
n
a
R
id
M
492
56
ss
a
Front
B
id
M
ss
a
Power
+12db
Q
HL
Q
+12db
USA
-12db
Cut / Boost
41.5
Made in
+12db
-12db
Cut / Boost
41.5
+12db
10 Band Parametric Equalizer
-12db
Cut / Boost
41.5
+12db
-12db
Cut / Boost
+12db
-12db
+12db
-12db
Tweeter
MidRange
POWER
PC1400/PC1800
CLASS™
Subwoofer
Passive
Crossover
Amplifier
LOWPASS OFF
POWER
PC1400/PC1800
CLASS™
LOWPASS OFF
LEFT CHANNEL
High Pass Frequencies
Amplifier
RIGHT CHANNEL
High Pass Frequencies
Low Pass Frequencies
19
POWER
CLASS™
PC1400/PC1800
Passive
Crossover
Amplifier
LOWPASS OFF
Subwoofer
Tweeter
MidRange
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TROUBLE SHOOTING
NO SOUND Is the LED lit?
YES
Check Power and Remote turn-on wire
for voltage. Make sure Ground wire is
secure.
PC 1800 ONLY
WHAT COLOR ?
RED
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
1-800-62POWER
AMPLIFIER PROTECTION
Substitute RCA inputs with another
source, and connect a known good
speaker to the output.
PrecisionPower
NO
GREEN
Dealer or Call:
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.
20
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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.
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. A uthorized Dealer Installed Products:
to the original purchaser, any unit which
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 immediately to
2. Non-Authorized Dealer Installed Products:
charge, to the original purchaser, any unit which
defective and under warranty, provided the defect occurs within ninety (90) days from the date of
purchase and the product is returned immediately to
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 returned for warranty work.
4. This warranty shall NOT apply to any
tory serial number removed or defaced. All products received (by
ranty or out of warranty repair , with their original serial numbers removed or def aced, will NO T 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
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
subject to misuse, neglect, or accident.
6. PrecisionPower does not authorize any other persons to assume any other liability in connection with its products. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BY
PRECISIONPOWER APPLICABLE TO ITS PRODUCTS. ANY IMPLIED WARRANTY OR MERCHANTABILITY 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 BREA CH 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. Y our product will be serviced on an in-warranty basis within the w arranty period for the correction of warranted defects. If improper operation of your
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:
TO RETURN PRECISIONPOWER PR ODUCTS 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
800-62-POWER for questions concerning out of warranty repair charges. Repaired unit will be
returned with an itemized statement, C.O.D.
PrecisionPower
PrecisionPower
owner’s manual. Nor shall this warranty apply to any part which has been
warrants its products to be free from defects in materials and
PrecisionPower
PrecisionPower’ s
. This warranty is not transferable.
PrecisionPower
PrecisionPower
PrecisionPower,Inc.
Service Department
4829 S. 38th Street
Phoenix, AZ 85040-2964
will either repair or replace at no charge,
examination discloses to be defective
PrecisionPower’s
will either repair or replace at no
examination discloses to be
PrecisionPower
product found to have the original fac-
PrecisionPower
PrecisionPower
PrecisionPower
. Warranty claims beyond
PrecisionPower
product used for a
product should occur,
Customer Service at 1-
) for in war-
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