3
CPX
™
4 Professional Stereo Power
Amplifier
Congratulations on your purchase of the CPX 4, a power amplifier designed for years of reliable, flawless operation under rigorous
use. This amplifier offers the sonic superiority and unsurpassed reliability for which Crest is famous, while remaining surprisingly
compact. Advanced technology and extensive protection circuitry allow operation with greater efficiency into difficult loads and
power conditions. The GCL™ (Gain Comparator Limiting) circuitry ensures trouble-free operation into loads as low as 2 Ohms. GCL
protects drivers and ensures that sonic integrity is maintained, even in extreme overload conditions. The CPX 4’s high-efficiency
design uses tunnel-cooled heat sinks and variable-speed DC fans. This cooling topology maintains a lower overall operating
temper
ature, resulting in longer output transistor life. For your safety, read the important precautions section, as well as input,
output and power connection instructions.
Although the CPX 4 amplifier is simple to operate and housed in an ultra-strong steel chassis, improper use can be dangerous.
This amplifier is very highpowered and can put out high voltages and sizable currents at frequencies up to 30 kHz. Always use
safe operating techniques when operating this amplifier.
Before you send signal through your amplifier, it is very important to ensure that the product has the proper AC line voltage
supplied. You can find the proper voltage for your amp printed next to the IEC line (power) cord on the rear panel of the
unit. Each product feature is numbered. Refer to the front panel diagram in this manual to locate the particular features
next to its number.
Please read this guide carefully to ensure your personal safety as well as the safety of your amplifier.
FEATURES:
• Gain Comparator Limiting (GCL)
• Line voltage selec
tor switch
• Dual cooling fans
• 100 Hz Crossover
• Front panel LEDs: GCL, Signal, Thermal Protect, and Power
• Switchable 2
nd
order 40 Hz high pass filter
• AC Power Switch / Circuit Breaker
ENGLISH
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