Related Manuals for Crest Audio CPX Series
Summary of Contents for Crest Audio CPX Series
- Page 1 ™ Series Power Amplifiers Operating Manual CPX 4 POWER AMPLIFIER TEMP www.crestaudio.com...
- Page 2 Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at their expense. www.peaveycommercialaudio.com Crest Audio 5022 HWY 493 N. Meridian, MS 39305 (601) 483-5365 FAX (601) 486-1278...
- Page 3 ENGLISH ™ 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.
- Page 4 Service Center, Distributor, ed on the rear of the unit. surface or in an environment which Dealer or contact Crest Audio at may impede the normal flow of air 601.483.5365 USA or visit www. Do not ground any hot (red) terminal.
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Page 5: Installation
Installation Cooling Requirements Unpacking Connecting Power The CPX 4 amplifier uses a forced-air Upon unpacking, inspect the The CPX 4 amplifier power require- cooling system to maintain a low, amplifier. If you find any damage, ments are rated at 1/8 power (typical notify your supplier immediately. - Page 6 Front Panel CPX 4 POWER AMPLIFIER TEMP The CPX 4 amplifier has a combination AC switch/circuit breaker on the front panel. If the switch shuts off during normal use, push it back to the ON position once. If it will not stay on, the amplifier needs servicing.
- Page 7 LINE VOLTAGE SELECTOR SWITCH The CPX series power transformer is designed with two primaries that can be placed in series or parallel by means of the line voltage selector switch. It is accessible by loosening one screw and rotating the transparent guard out of the way.
- Page 8 Rear Panel DUAL PRIMARY FUSE In order to accommodate line voltage switching, the power transformer is designed with two prima-ries that can be placed in series or parallel by means of the line voltage selector switch. Each primary is individually fused, so there is no need to change fuse values when a different line voltage is selected. It is important to use the fuse values specified on the rear panel.
- Page 9 Rear Panel Crest’s patented GCL (Gain Comparator Limiting) limiter circuit enables the sound technician to maximize the performance of the amplifier/speaker combination by preventing the power amplifier from clipping. When the onset of clipping is detected, the limiter engages to prevent damage to the loudspeakers and degradation of sound quality.
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Page 10: Operation Modes
Operation Modes Stereo Operation For stereo (dual channel) operation, turn the amplifier off and set the mode select switches on the back panel to the OUT (extended) position. In this mode, both channels operate independently of each other with their input attenuators controlling their respective levels. -
Page 11: Protection Features
Protection Features The CPX 4 amplifier incorporates several circuits to protect both themselves and loudspeakers under virtually any situation. Crest has attempted to make the amplifiers as foolproof as possible by making them immune to short and open circuits, mismatched loads, DC voltage, and overheating. If a channel goes into the Gain Comparator Limiting or GCL gain reduction mode, the speaker load remains connected, but clipping percentage is instantly reduced. -
Page 12: Speaker Protection
Safety Speaker Protection All loudspeakers have electrical, thermal and physical limits that must be observed to prevent damage or failure. Too much power, low frequencies applied to high frequency drivers, severely clipped waveforms and DC voltage can all be fatal to cone and compression drivers. The Crest CPX 4 amplifier automatically protects speakers from DC voltages and subsonic signals. - Page 13 Specifications CPX 4 Rated Power @ 120 VAC or 240 VAC Stereo* Mode 2 Ω, 1 kHz, 1% THD (RMS per channel) 800 W 4 Ω, 1 kHz, 1% THD (RMS per channel) 1,600 W 8 Ω, 1 kHz, 1% THD (RMS per channel) 1,005 W Bridge* Mode (Mono) 8 Ω, 1 kHz, 1% THD (RMS)
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Page 14: Specifications
Specifications CPX 4 Turn on/off muting Load DC (triac crowbar) Low-cut filter Power Consumption Stereo Mode, both channels driven @ 1/8 rated output power, 4 Ω 750 W Dual Voltage Mains Voltage Selector switch 220-240 & 115 V AC, 50/60 Hz Mains Connector GCL™/Clipping - Red LED Indicators... -
Page 15: Wire Gauge
Wire Gauge stranded cable length wire gauge power loss 8 Ohms load 4 Ohms load 2 Ohms load 2.9% 5.6% 10.8% meters 1.74 0.75 1.16 0.58 1.16 0.35 0.70 1.39 0.22 0.44 0.87 meters 4.3% 8.2% 15.5% 0.75 10.8 1.45 0.87 1.74 0.55... - Page 16 Wire Gauge stranded cable length wire gauge power loss 8 Ohms load 4 Ohms load 2 Ohms load feet 0.81% 1.61% 3.2% 0.51 1.02 0.32 0.64 1.28 0.20 0.40 0.80 0.128 0.25 0.51 feet 1.61% 3.2% 6.2% 1.02 0.64 1.28 0.40 0.80 1.60...
- Page 18 Features and specifications subject to change without notice. Crest Audio 5022 HWY 493 N. Meridian, MS 39305 (601) 483-5365 FAX (601) 486-1278 Logo referenced in Directive 2002/96/EC Annex IV (OJ(L)37/38,13.02.03 and defined in EN 50419: 2005 The bar is the symbol for marking of new waste and...
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