OWNERS MANUAL
PC360.2 / PC650.2
PC400.4 / PC640.4 / PC1000.1 / PC740.5
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CONGRATULATIONS
Thank you for choosing Precision PowerTM audio equipment. Designed and
engineered in the USA, this product combines innovative technology with
the finest materials to consistently deliver Absolutely State of the Art™ perfor-
mance, sound quality, reliability, and value. This Precision PowerTM product
reflects our commitment to offer you unparalleled p erformance and quality
for years of dependable service and listening enjoyment.
SERVICE
Do not attempt to service Precision PowerTM products yourself.
Performing maintenance on your audio equipment will void the warranty.
Many parts of the Precision PowerTM product are custom built to our speci-
fications. Our factory parts are not made available to anyone else nor are
they for sale. Our goal is to make sure that your Precision PowerTM product will
always sound as good as the day it was purchased. Contact your Authorized
Precision PowerTM Dealer about obtaining any warranty service through Preci-
sion PowerTM.
CAUTION
Extended use of a high powered audio system may result in hearing loss or
damage. While Precision PowerTM systems are capable of “Concert Level”
volumes with 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.
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FEATURES
Sequenced Delays Eliminate Residual Power-Up/Power-Down Pops.
Differential RCA Inputs Isolate 12V/Audio to Ground, Eliminating Ground Loops and
Noise.
•
•
Full Signal Path Low Noise/Distortion Circuitry Topology.
Optimal Component Layout for Minimal Distortion Induction & Signal Separation.
Triple Darlington Audio Output Stages
Differential Drives Divide Pre-Amp & Power-Amp Stages, Eliminating Ground Looping
Full Differential Feedback Surrounding Power-Amp Stages directly from Speaker Ter-
minals resulting in Uncolored Sound Reproduction and Elimination of Ground Loops
Output Stage Bias Individually Sequenced, Optimizing Sound Quality
Stout 2 Oz. Copper Traces Effortlessly Transfer High Volume Internal Current
Close Tolerance Signal Path Components - 1% Resistors & 5% Capacitors
Large TO218 MOSFET Transistors
•
•
•
•
•
•
•
•
•
•
High Volume, Low ESR Capacitance Banks Compensate Power Supply Ripple Cur-
rents
Extra Low Current Drive Stage Increases Efficiency & Sound Clarity
Individually Regulated Preamp/Crossover Power Supplies Ensure Signal Purity
Separated Capacitor Charging/Discharging Current Paths Prevent Rail Switching
Spikes & Ground Traces from Entering Signal Stages Resulting in Distortion
•
•
•
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SPECIFICATIONS
PC360.2
2
PC650.2
2
PC400.4
4
PC640.4
4
Channels
RMS Power @ 4Ω, 14.4V
110W X 2
195W X 2
70W X 4
115W X 4
RMS Power @ 2Ω, 14.4V
RMS Power @ 4Ω Bridged
180W X 2
360W X 1
0.02%
325W X 2
650W X 1
0.02%
100W X 4
200W X 2
0.02%
160W X 4
320W X 2
0.02%
Total Harmonic Distortion (4Ω
power)
Frequency Response
Input Sensitivity
15-50KHz
200mV-9V
102dB
15-50KHz
200mV-9V
102dB
15-50KHz
200mV-9V
102dB
15-50KHz
200mV-9V
102dB
Signal-to-Noise Ratio (4Ω
power)
Damping Factor (100Hz, 4Ω)
>3000
>1500
>2000
>3000
Dimensions: H X W X L
2.3” X 10” X
12.1”
2.3” X 10” X
15.7”
2.3” X 10” X
13.7”
2.3” X 10” X
17.2”
Channels 1&2 HPF (12dB
Slope)
15-4KHz
15-4KHz
15-4KHz
15-4KHz
Channels 1&2 LPF (12dB
Slope)
50-4KHz
50-4KHz
-
-
Channels 3&4 HPF (12dB
Slope)
-
-
-
-
15-4KHz
50-4KHz
-
15-4KHz
50-4KHz
-
Channels 3&4 LPF (12dB
Slope)
Channels 1&2 Bass Boost
30-90Hz
0-12dB
30-90Hz
0-12dB
Channels 3&4 Bass Boost
-
30-90Hz
0-12dB
30-90Hz
0-12dB
Remote Gain Control
External Fuse Required
Included
40
Included
80
-
-
60
80
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SPECIFICATIONS
PC740.5
PC1000.1
Channels
5
1
-
RMS Power @ 4Ω, 14.4V
70W X 4, 275W X 1
RMS Power @ 2Ω, 14.4V
RMS Power @ 4Ω Bridged
RMS Power @ 1Ω, 14.4V
Total Harmonic Distortion (4Ω power)
Frequency Response
100W X 4, 450W X 1
200W X 2
-
1000W X 1
-
1000 x 1
0.02%
0.02%
15-50KHz
200mV-9V
104dB
15-200Hz
Input Sensitivity
200mV-9V
Signal-to-Noise Ratio (4Ω power)
Damping Factor (100Hz, 4Ω)
Dimensions: H X W X L
102dB
>1400
>2400
2” X 10” X 16.75”
15-4KHz
-
2.3” X 10” X 16.5”
Channels 1&2 HPF (12dB Slope)
Channels 1&2 LPF (12dB Slope)
Channels 3&4 HPF (12dB Slope)
Channels 3&4 LPF (12dB Slope)
Channels 5 LPF (12dB Slope)
Bass Boost
-
50-200Hz
15-500Hz
50-4KHz
50-200Hz
-
-
-
0-12dB
0-12dB
(CH5 only)
30-90Hz
Subsonic Filter Slope 12dB
Phase Control
15-50Hz
0 or 180/switch
Included
100
15-50Hz
0 or 180/variable
Included
Remote Gain Control
External Fuse Required
150
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Installation
Before installing any audio equipment, it is good practice to disconnect the ground
terminal on the battery to avoid damage
to the vehicle or audio equipment. Failure to do this means you’re a few brews short
of a 6-pack and you probably
already acquired the nickname of “Sparky” or “Smokey”. Not cool! Do NOT hook the
ground cable back up to the battery
until the rest of the wiring is complete.
Factory ground wire may
need to be upgraded, especially
if it is smaller than the
battery
power wire, frayed, or broken.
terminal
Positive
Fuse must be
installed within
18” of battery.
Run signal cables (RCA)
and remote turn-on lead
down the opposite side of
Drill a hole in the firewall &
the vehicle of the power
use a rubber grommet to
wire to avoid radiated noise.
keep wire from shorting.
Run the cables under the
carpet near the side of the
vehicle. Be careful not to
drill or screw into the
wires when replacing trim.
Avoid sharp edges
that could chafe
through the insulation.
Ground cable to
bare metal chassis/
frame with nut &
bolt. No screws or
seat/seatbelt bolts!
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TERMINALS
* Power terminal block & Speaker terminal block for PC360.2 / PC650.2
* Power terminal block & Speaker terminal block for PC400.4 / PC640.4
* Power terminal block & Speaker terminal block for PC1000.1
* Power terminal block & Speaker terminal block for PC740.5
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CONTROLS
* Crossovers for PC360.2 / PC650.2
* Crossovers for PC400.4 / PC640.4
* Crossovers for PC1000.1
* Crossovers for PC740.5
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Control Definitions
Alrighty, here comes the fun stuff. We’re going to break this down to it simplest form so that there
is no way you can possibly do any damage in the installation process to your audio system.
We’re going to explain in detail how every single knob and switch work rather than turn you loose
on a sophisticated amplifier and have problems. READ EVERYTHING!
Trust us, it’ll be worth it… Before you do anything, undo the ground cable from the battery.
Power Terminal Block
GND – This is the Ground connection. Bolt the Ground cable to a bare metal part of the chassis/
frame. Do NOT us self-tapping screws or seat/seatbelt bolts!
+12V – This is the Power Connection. This cable gets connected directly to the battery. You MUST
use a fuse holder or circuit breaker within 18” of the battery. All cables ran through the firewall
must be protected by a rubber or plastic grommet. If you have multiple amplifiers, the main fuse
or circuit breaker at the battery should be the sum of all fuses or slightly less.
REM – This is the remote Turn-On connection. Connect to the amplifier output or power antenna
output of the source unit. If the unit does not have a switched +12V output, you can use another
switchable +12V.
Speaker Terminal Block
This is the Speaker(s) Connection. All components, coaxials and subwoofers connect here.
Crossovers
These controls allow you to pass and block frequencies to each driver. This is one of the most
important parts of tuning any audio system.
LOW PASS – This control allows you to pass only frequencies lower than the frequency you choose
to the drivers. For example, if you are powering a sub woofer and you choose 70Hz, then only
70Hz and lower tones will be passed through to the subs while all unwanted higher frequencies
above 70Hz will be blocked.
HIGH PASS - This control allows you to pass only frequencies higher than the frequency you
choose to the drivers.
High Pass crossover filters below 50Hz are also considered “subsonic” filters.
Multiplier Switches – Sometimes you may need a range that is not within the range supplied
by the control potentiometer. In this case, if the amplifier has a multiplier switch, the range can
change to accommodate your needs. For example, let’s say you have a 4 channel amplifier
and you want to put the tweeters (1”) on the front channels and the midbass (6.5”) on the rear
channels, and use all electronic crossovers. You can set the High Pass for the tweeters at 4kHz.
The low pass, if it as two ranges, may be from 50-800Hz which is not high enough. By using the
multiplier switch, that same control can change the range from 50Hz-800Hz to 250Hz-4kHz. If this
doesn’t make sense and you do not understand frequencies clearly, PLEASE TAKE YOUR AMP TO A
PROFESSIONAL PRECISION POWER DEALER!
Bass EQ – This circuit allows you to choose a frequency between 30Hz and 90Hz and boost that
frequency by 0-12dB.
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Crossovers(continued..)
Xover Mode Switch – Select HP/FR for High Pass / Full Range and only the HIGH PASS functions
will work. The High Pass filter is ne ver off, but can be set to 15Hz which passes the entire audible
spectrum to be reproduced. If you select LP/BP for Low Pass and Band Pass, then the LOW PASS
function works as well. You can use the Low Pass in conjunction with the always-on High Pass to
band pass the signal to the drivers. For example...Let’s say you have 3-way components consist-
ing of a 1” tweeter, 4” midrange and a 6.5” midbass. Your 4” and 1” are on another amplifier. You
can set the midbass to play just the midbass frequencies by setting the LOW PASS to 400Hz and
setting the high pass to 60Hz. This will effectively give you a dedicated midbass region that will
not overlap into the midrange frequencies or subwoofer frequencies.
Input Gain – While most people set this control by ear to how loud they want their music, this is
not the intent of this control. The range is from 0.2 volts to 9 volts. The control is meant for match-
ing to the source unit’s output signal voltage. For example, if you have a unit with low output volt-
age, you would probably have the control set fairly high, towards the 0.2V range. A lot of head
units have 4 volts of signal voltage which mean that your control would be set in midway through
the range. If you happen to have a line driver (signal booster) that yields 9volt or more, you will
set the gain at the minimum position. In all of these examples, when properly level matched, the
amplifier will put out full volume. Setting the control above the proper point may cause dam-
age to the amplifier and speakers, and can result in poor sound quality and overall undesirable
results…
RCA Signal Inputs – Ummm… If you do not know what goes here, get over to your local PRECI-
SION POWER dealer immediately!
Balanced Signal Inputs – Using our BLT Balanced Line Transmitters, you can achieve balanced,
noise-free signal transfer. This is a MUST and no-brainer for any audiophile, sound quality competi-
tor, or anybody serious about their music.
CH1&2 Signal Mode – There are two options here for the signal processing. You can either
choose CH1&2 HP/FR for High Pass or Full Range operations, or you can choose COPY CH3&4
making channels 1&2 receive the same processing as channels 3&4. This is handy if you want
channels 1&2 to be identical to 3&4 or if you need low pass or band pass signal. Understand
that this bypasses EVERYTHING so that the front channels are identical to the rear channels.
Phase Switch – This switch changes the phase of the woofer from 0 to 180 degrees.
Subsonic – The Subsonic Filter protects your subwoofers from playing frequencies below the physi-
cal limitations of the woofer, or that are beyond the human hearing capabilities. The Subsonic
Filter will reduce the playback of these frequencies, and allow the amplifier to use the once
wasted power for the audible frequency range. For example, let’s say your subwoofer plays just
fine, but at 20Hz tones it starts to flutter and get distorted. You can set the frequency to 25Hz
and not have to worry about super low frequencies damaging your speakers because no music
material below 25Hz will go to the subwoofers.
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Crossovers(continued..)
Remote Control – This the port for the Remote Control so you can use the supplied unit to control
the gain from the front of the vehicle.
Input Mode – When in 4CH mode, all 4 channels of signal are required and fadability is in effect.
When in 2CH mode, only 2 channels of signal are required and CH1&3 get the same signal, and
CH2&4 get the same signal. Fadability is lost in 2CH mode.
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System Diagrams
MONO Channel System Design #1
PC1000.1
2-8 Ohms
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System Diagrams
2Channel System Design #1
PC360.2 / PC650.2
2Channel System Design #2
PC360.2 / PC650.2
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System Diagrams
2Channel System Design #3
PC360.2 / PC650.2
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System Diagrams
4Channel System Design #1
PC400.4 / PC640.4
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System Diagrams
4Channel System Design #2
PC400.4 / PC640.4
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System Diagrams
4Channel System Design #3
PC400.4 / PC640.4
WOOFER
4-8ohms
2CH
4-8 Ohms
1CH
4-8 Ohms
3CH
4-8 Ohms
4CH
4-8 Ohms
WOOFER
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System Diagrams
5Channel System Design #1
PC740.5
5CH
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System Diagrams
5Channel System Design #2
PC740.5
5CH
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System Diagrams
5Channel System Design #3
PC740.5
WOOFER
4-8ohms
2CH
4-8 Ohms
1CH
4-8 Ohms
5CH
3CH
4-8 Ohms
4CH
4-8 Ohms
WOOFER
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TroubleShooting
SYMPTOM
NO SOUND
CHECK
REMEDY
Is the Status LED illumi-
nated GREEN? NO?
Check all fuses to the amplifier
Confirm remote turn-on lead is connected
at the amp and at
the radio/switched +12Volts
Clean contacts on fuse holder
Verify ground is secure
Is the Status LED illumi-
nated GREEN? Yes?
Check gain on amp
Check source level volume
Check for Speaker or wire short
Re-secure power cable
AMP NOT SWITCH-
ING ON
No power to power wire
Poor Ground
Must have bare metal ground
Check at source and amp
Does remote wire have
+12V
Check fuses
Burnt, broken, detached?
NO SOUND ON
ONE CHANNEL
Check speaker wire
Look for shorts, pinches or disconnected
terminal
Check RCAs
Swap left with right. If the bad side began
working, the problem
is before the amplifier
AMP SHUTS DOWN Check speaker load
Verify that the load does not drop below the
specified ohm
level
STATUS LED IS ON
- RED
Check temperature
Speakers shorted
Wait for amp to cool down
Check to see if it is the wire or the speak-
ers themselves
SMOKE CAME OUT Either you spilled your beer Put smoke back inside
on it or did not read
this manual and follow the
directions
CAN’T KEEP THE
OPPOSITE
Is volume loud enough for
others to hear?
To avoid the opposite sex, buy a different
brand of amplifier
SEX OFF ME
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