Crest Audio CPX 4, Operating Manual

Page 1: ...www crestaudio com CPX Series Power Amplifiers CPXTM 4 Operating Manual TEMP PWR 6 16 20 23 26 29 32 6 16 20 23 26 29 32 SIG SIG PWR CPX 4 POWER AMPLIFIER GCLTM GCLTM TM PWR ON ...

Page 2: ...tions to the equipment not approved by Peavey Electronics Corp can void the user s authority to use the equipment Note This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment T...

Page 3: ... 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 amp...

Page 4: ...is not responsible for damage to loudspeakers for any reason 12 Do not connect the inputs or out puts of amplifiers to any other voltage source such as a battery mains source or power supply regardless of whether the ampli fier is turned on or off 13 Connecting amplifier outputs to oscil loscopes or other test equipment while the amplifier is in bridged mono mode may damage both the amplifier and ...

Page 5: ...igh signal level at the inputs Whether you buy or make them use good quality connections input cables and speaker cables along with good soldering technique to ensure trouble free operation Most intermittent problems are caused by faulty cables Consult theWire Gauge Chart to determine proper gauges for different load impedances and cable lengths Remember that cable resistance robs amplifier power ...

Page 6: ...ld A steady bright glow means the amp is clip limiting or reducing gain to prevent severely clipped waveforms from reaching the loudspeakers See the Gain Comparator Limiting section for more information SIGNAL LED This LED lights when its channel produces an output signal of about 1 volt RMS or more This signal indicates whether a signal is reaching and being amplified by the amplifier POWER LED T...

Page 7: ...sociated equipment is properly grounded NOTE FOR U K ONLY As the colors of the wires in the mains lead of this apparatus may not correspond with the colored markings identifying the terminals in your plug proceed as follows 1 The wire which is colored green and yellow must be connected to the terminal which is marked by the letter E or by the Earth symbol or colored green or green and yellow 2 The...

Page 8: ...l A output with channel B appearing at termials 2 and 2 For BRIDGE mode use only the channel A twist lock connector and the output is at terminal 1 and the output is at terminal 2 which is fed from Channel B output HIGH OUT JACKS This 1 4 jack supplies high frequency output signals from the activated crossover for patching to this amplifier and or additional power amplifier inputs Unlike the low f...

Page 9: ...The CPX4 has twist lock output connectors Channel A and Channel B may be accessed individually with 2 conductor connectors with at terminal 1 and at terminal 1 A 4 conductor twist lock may be used on the channel A output with channel B appearing at terminals 2 and 2 For BRIDGE mode use only the channel A twist lock connector and the output is at terminal 1 and the output is at terminal 2 which is ...

Page 10: ...when operating in bridged mode potentially lethal voltage may be present at the output termi nals To bridge the amplifier depress the rear panel Bridge Mode switch 17 to the IN position Direct the signal to channelA sinputandconnectthespeakersacrosspin 1andpin 2ofthechannelASpeakon outputconnector Only channel A s input attenuator is active while in Bridged Mono mode Bridged Operation Unlike the S...

Page 11: ...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 DC voltage on the output excessive subsonic frequencies or thermal ove...

Page 12: ...ut In systems with active electronic crossovers use one for each frequency band The clip limiter will automatically limit the duration of continuous square waveforms applied to the speakers Some speaker systems are packaged with processors that have power limiting circuits and should not require additional external limiting Do not drive any low frequency speaker enclosure with frequencies lower th...

Page 13: ...tive TRS 1 4 Jack 10 kΩ Overall System Gain per Channel 40X 32 dB Distortion THD Stereo Mode both channels driven 20 Hz 20 kHz 10 dB 4 Ω 0 1 Slew Rate 12 V µs Damping Factor 8 Ω 20 Hz 2 kHz Stereo Mode both channels driven 8 Ω 20 Hz 2 kHz 400 1 Topology Class H Limiter GCL switchable Yes Input Connectors Input 2 x 3 pin XLR 1 4 Jack TRS Combo Link 2 x 1 4 Jack TRS High Out Output Connectors Stereo...

Page 14: ...oltage Dual Voltage Selector switch 220 240 115 V AC 50 60 Hz Mains Connector IEC LED Indicators GCL Clipping Red Signal Yellow Thermal Protect Red Power Green Dimensions Weight Net Weight 43 lbs 19 5 kg Dimensions HWD 3 5 x 19 x 16 25 89 mm x 483 mm x 413 mm Repetitive burst 20 ms Specifications subject to change without notice Specifications CPX 4 ...

Page 15: ...5 0 87 0 55 0 37 8 2 5 6 2 9 1 74 1 09 0 73 15 5 10 8 5 6 3 4 2 2 1 45 0 5mm2 0 75 1 5 2 5 4 6 8 24 5 6 2 9 1 74 1 09 0 73 5 5 10 8 5 6 2 9 1 74 1 09 28 19 9 10 8 6 7 4 3 2 9 0 75mm2 1 5 2 5 4 6 10 15 5 8 2 5 1 3 2 2 2 1 31 0 73 15 5 9 8 6 3 4 3 2 6 45 28 18 2 12 0 8 2 5 1 2meters 5meters 10meters 30meters wire gauge power loss 8Ohms load 4Ohms load 2Ohms load Wire Gauge ...

Page 16: ... 0 64 0 40 0 25 3 2 2 0 1 28 0 80 0 51 6 2 4 0 2 5 1 60 1 01 18AWG 16 14 12 10 8 6 2 4 0 2 5 1 60 1 01 0 60 11 9 7 7 5 0 3 2 2 0 1 20 22 14 6 9 6 6 2 4 0 2 4 18AWG 16 14 12 10 8 11 9 7 7 5 0 3 2 2 0 1 20 22 14 6 9 6 6 2 4 0 2 4 37 26 17 8 11 8 7 7 4 7 5feet 10feet 40feet 80feet wire gauge power loss 8Ohms load 4 Ohms load 2Ohms load Wire Gauge ...

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Page 18: ... 2005 The bar is the symbol for marking of new waste and is applied only to equipment manufactured after 13 August 2005 www crestaudio com Features and specifications subject to change without notice Crest Audio 5022 HWY 493 N Meridian MS 39305 601 483 5365 FAX 601 486 1278 2022 Rev F1_01072022 ...