Precision Power PCX 250, PCX 280 User Manual

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

8900-4005

PCX 250

PCX 280

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

Adaptive PWM Power Supply.
Triple Darlington Output Stage.
AP-IV Protection Circuitry.
Forced Air Thermal Management. (PCX 280)

QBASS ™ Bass Boost (PCX 250)
QBASS Plus™ Bass Boost. (PCX 280)

High Voltage Input Capability with -12dB Attenuation Switch.
Gold Plated RCAInput and Output Connectors.
PowerLock™ Speaker and Power Wire Connectors.
Mixed Mono/Stereo Operation.
3-Yr Warranty when installed by an Authorized PrecisionPower Dealer.

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 (stereo) 2 - 8 Ohms
Load Impedance (bridged) 4 - 8 Ohms
Supply Voltage 11 - 15 Volts
Damping Factor >500
Slew Rate >50 V/µS

QBASS™ Up to +12dB Boost @ 40Hz
QBASS PLUS™ Up to +18dB Boost

@ 30, 36, 44, or 60Hz
Crossovers 12dB/Octave
Crossover Frequency 30-4kHz
Idle Current: PCX 250 1.5 Amps

PCX 280 2 Amps

MODEL 4ohm STEREO 2ohm STEREO 4ohm MONO

PCX 250 2 X 50 2 X 100 1 X 200
PCX 280 2 X 80 2 X 160 1 X 320

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

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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 to 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 250
PCX 280

Maximum Fuse Rating

30 Amp
35 Amp

318

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.

Warning! A Main Fuse must be installed within 18" of battery!

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