Precision Power PCX1250 User Manual

PrecisionPower 9235 South McKemy Street, Tempe, Arizona 85284 www.precisionpower.com

8900-4006

PCX 1250

PCX 1500

NO SOUND Is the LED lit?

YES NO

Check Power and Remote turn-on
wire for voltage. Make sure Ground
wire is secure.

STILL NO SOUND

See your Authorized PrecisionPower Dealer or call 1-800-62POWER.
SOUND IN ONE CHANNEL ONLY
Reverse left and right speakers by unplugging the speaker connector, turning it

over and plugging it back in.

NEW! Advanced Instrumentation Input Stage.
NEW! 12dB/Octave; HP/LP/FULL; 30-4kHz Crossover.
NEW! Independent Line Output Crossover 30-4kHz.

PWM Power Supply.
Triple Darlington Output Stage.

AP-IV Protection Circuitry.
QBASS™ Bass Boost.

High Voltage Input Capability with -12dB Attenuation Switch.
Gold Plated RCA Input and Output Connectors.
PowerLock™ Speaker and Power Wire Connectors.
3-Yr Warranty; installed by an Authorized PrecisionPower Dealer.

SOUND IS NOW IN

OPPOSITE CHANNEL SAME CHANNEL

Reverse RCAinputs Problem is in the speaker or

speaker wire of the silent channel

SOUND IS NOW IN

OPPOSITE CHANNEL SAME CHANNEL

Reverse RCAs at head unit Problem is in the Amplifier. See your

local Authorized PrecisionPower Dealer
or call 1-800-62POWER.

SOUND IS NOW IN

OPPOSITE CHANNEL SAME CHANNEL

Problem is in the head unit Problem is in the RCAcables

or before the amplifier

PCX 1250

Power Bandwidth 10 Hz - 50 kHz
Total Harmonic Distortion < 0.02 %
S/N Ratio > 110dB
Input Topology Instrumentation
Input Sensitivity 150mv - 12 Volts RMS
Input Impedance 10k Ohms
Load Impedance (mono) 2 - 8 Ohms
Supply Voltage 11 - 15 Volts
Damping Factor > 500
Slew Rate > 50 V/µS
QBASS ™ Up To +12dB Boost

@ 40Hz
Crossovers 12dB/Octave
Crossover Frequency 30-4kHz
Subsonic Crossover Frequency 5-80Hz
Idle Current: PCX 1250 1 Amp

MODEL 4ohm MONO 2ohm MONO

PCX 1250 1 X 250 1X 500

* ALL POWER RATINGS SHOWN ARE TESTED @ 12V; 20-20kHz

Length Height Width

PCX 1250 17.00” 2.375” 10”

20

1

On the PCX 1250 amplifier, we offer tremendous control of your bass with
QBASS™. On the front end panel of your PCX 1250 you will find the QBASS™
level control. Adjust the level control clockwise for up to 12 dB of boost at a
factory preset frequency of 40Hz with a Q-factor of 2

CAUTION: QBASS ™ should only be used in systems with a strong subwoofer
section. +12dB is a large amount of bass boost and may damage your speakers
if abused.

18 3

NOTE: TOOLS ARE 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, flat washer star washer) [see detail]
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 - 12-16 gauge
Grommets (sized to work with the power wire you plan to use
in your installation)
Tube of silicone sealant

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.You may also want to add a power
distribution block near your amplifiers to distribute large gauge power cable to
multiple amplifiers.

Amplifier

PCX 1250
PCX 1500

Maximum Fuse Rating

60 Amp

100 Amp

516