Crest Audio 9001 Owners Manual

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1.Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 2. Read all documentation before oper- ating your equipment. Retain all docu- mentation for future reference. 3. Follow all instructions printed on unit chassis for proper operation. 4. Do not spill water or other liquids into or on the unit, or operate the unit while standing in liquid. 5. Make sure power outlets conform to the power requirements listed on the back of the unit. 6. Do not use the unit if the electrical power cord is frayed or broken. The power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular atten- tion to cords and plugs, convenience receptacles, and the point where they exit from the appliance. 7. Always operate the unit with the AC ground wire connected to the electri- cal system ground. Precautions should be taken so that the means of grounding of a piece of equipment is not defeated. 8. Mains voltage must be correct and the same as that printed on the rear of the unit. Damage caused by connec- tion to improper AC voltage is not cov- ered by any warranty. 9. Have gain controls on amplifiers turned down during power-up to pre- vent speaker damage if there are high signal levels at the inputs. 10. Power down & disconnect units from mains voltage before making connec- tions. 11. Never hold a power switch in the ON position if it wont stay there itself! 12. Do not use the unit near stoves, heat registers, radiators, or other heat producing devices. 13. Do not block fan intake or exhaust ports. Do not operate equipment on a surface or in an environment which may impede the normal flow of air around the unit, such as a bed, rug, weather- sheet, carpet, or completely enclosed rack. If the unit is used in an extremely dusty or smoky environment, the unit should be periodically blown free of foreign matter. 14. Do not remove the cover. Removing the cover will expose you to potentially dangerous voltages. There are no user serviceable parts inside. 15. Connecting amplifier outputs to oscilloscopes or other test equipment while the amplifier is in bridged mode may damage both the amplifier and test equipment! 16. Do not drive the inputs with a signal level greater than that required to drive equipment to full output. 17. Do not connect the inputs / outputs of amplifiers or consoles to any other voltage source, such as a battery, mains source, or power supply, regardless of whether the amplifier or console is turned on or off. 18. Do not run the output of any amplifi- er channel back into another chan- nels input. Do not parallel- or series- connect an amplifier output with any other amplifier output. Crest Audio is not responsible for damage to loud- speakers for any reason. 19. Do not ground any + (hot) termi- nal. Never connect a + (hot) output to ground or to another + (hot) out- put! 20. Non-use periods. The power cord of equipment should be unplugged from the outlet when left unused for a long period of time. 21. Service Information Equipment should be serviced by qualified service personnel when: A. The power supply cord or the plug has been damaged; B. Objects have fallen, or liquid has been spilled into the equipment; C. The equipment has been exposed to rain; D. The equipment does not appear to operate normally, or exhibits a marked change in performance; E. The equipment has been dropped, or the enclosure damaged. 22. To obtain service , contact your nearest Crest Audio Service Center, Distributor, Dealer, or Crest Audio at 201.909.8700 (USA). All Professional Series power amplifier models are UL LISTED, except for: 10001 10004 MA5850 MA7120 MA9130 Important Precautions This symbol is used to alert the oper- ator to follow important operating pro- cedures and precautions detailed in documentation. This symbol is used to warn opera- tors that uninsulated dangerous volt- ages are present within the equip- ment enclosure that may pose a risk of electric shock.

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Crest Audio Pro Series Power AmplifiersPage 1 Power Amplifier Owners Manual Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Cooling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 3 Operating Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Crest Audio Model 7301 Power Amplifier . . . . . . . . . . 3 Crest Audio Model 10004 Power Amplifier . . . . . . . . . 3 Models 3301, 4801, 6001 Features . . . . . . . . . . . . . . . . 4 Model 4601 Features . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Model 7001 Features . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Model 7301 Features . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Model 8001 Features . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Model 9001 Features . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Model 10001 Features . . . . . . . . . . . . . . . . . . . . . . . . . 8 Model 10004 Features . . . . . . . . . . . . . . . . . . . . . . . . . 9 Connecting Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Connecting Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Crest Audio Octal Sockets . . . . . . . . . . . . . . . . . . . . . 10 NexSys ®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10\ Connecting Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Bridging Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 12 Switches and Controls . . . . . . . . . . . . . . . . . . . . . . . . 12 Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Protection Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Speaker Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Amplifier Maintenance and User Responsibility . . . . . 15 Service/Warranty Information . . . . . . . . . . . . . . . . . . . 15 Professional Series Block Diagram . . . . . . . Appendix A General Amplifier Specifications . . . . . . . . . Appendix B Wire Gauge Charts. . . . . . . . . . . . . . . . . . . . Appendix C Meyer-Compatible Power Amplifiers . . . . . . Appendix D

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Crest Audio Pro Series Power AmplifiersAppendix B 1kHz, <0.025% THD+N 20Hz-20kHz, <0.05% THD+N 400W 300W 575W 480W 1150W 960W 700W 600W 1300W 1200W 60V 85V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High Temp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input. <0.025% <0.1% 400:1 >60 dB 1.1V RMS X40 >20k½ > -100 dB > -60dB H Female XLR (pin 3+), Octal Socket 5-way output binding posts 80,000 µF 120V, 60Hz 1.1A 5.6A 11.46 18.0A 1803 BTU/hr 3385 BTU/hr Rear to front tunnel heatsink, variable speed DC fan Front panel: 2 attenuators, circuit breaker/power switch; Rear panel: mode switch, signal ground lift jumper. Clip/Limit, Signal, Temp/DC, Active 16 ga. single piece steel chassis, .187" (5mm) alum. front panel 3.5"x19"x15" (16" to rear ears) 89mm x 483mm x 381mm (406mm to rear ears) 54.0 lbs (24.52 kg.), 49.0 lbs (22.25 kg.) 5 years, parts and labor-  8½ Stereo Power 4½ Stereo Power 8½ Bridged Mono Power 2½Stereo Power 4½ Bridged Mono Power Max RMS Output Voltage (each channel) Peak Output Voltage (each channel) Frequency Response (+0 / -0.3dB, 1W/8½ ) Power Bandwidth (rated power at 4½, 1% THD+N) Protection Circuitry THD+N (rated power at 4 ½, 1kHz) SMPTE IMD (rated power at 8½, 60Hz & 7kHz) Damping Factor (10-400Hz at 8½) Input CMRR (1kHz) Input Sensitivity (rated power at 4 ½) Voltage Gain Input Impedance (balanced) Hum and Noise (A weighted, full power, 4½ ) Crosstalk (A weighted, full power, 4½) Class Input Connectors (per channel) Output Connectors (per channel) Filter Storage Standard Power Supply (120V) Idle Current Draw (120V) 1/8 Power Curr. Draw (typical music, 120V/4 ½) 1/3 Power Curr. Draw (continuous music, 120V/4 ½) Max Curr. Draw (circuit breaker rating, 120V/4 ½) Thermal Emissions (1/8 Power, 4½ ) Thermal Emissions (1/3 Power, 4½) Cooling Controls LED Indicators (per channel) Construction Dimensions (Height x Width x Depth) Gross Weight, Net Weight Warranty -  USA, Canada, U.K., and many other countries. Power figures are watts per channel, both channels driven. Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications. Crest Audio specification literature is available in downloadable PDF file format; visit our website at http://www.crestaudio.com. 12/15/97 Appendix B - General Amplifier Specifications (Model 4801)

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Crest Audio Pro Series Power AmplifiersAppendix C Appendix C - Wire Gauge Charts Stranded Cable Lgth. (m) 2 5 10 30Wire Gauge (mm 2) 0.3 0.5 0.75 1.5 2.5 4 0.5 0.75 1.5 2.5 4 6 0.5 0.75 1.5 2.5 4 6 0.75 1.5 2.5 4 6 10 Power Loss (8 ohm load) 2.9% 1.74 1.16 0.58 0.35 0.22 4.3% 2.9 1.45 0.87 0.55 0.37 8.24% 5.6 2.9 1.74 1.09 0.73 15.5% 8.2 5.1 3.2 2.2 1.31 Power Loss (4 ohm load) 5.6% 3.4 2.3 1.16 0.70 0.44 8.2% 5.6 2.9 1.74 1.09 0.73 15.5% 10.8 5.6 2.9 1.74 1.09 25% 15.5 9.8 6.3 4.3 2.6 Power Loss (2 ohm load) 10.8% 6.7 4.5 2.3 1.39 0.87 15.5% 10.8 5.6 3.4 2.2 1.45 28% 19.9 10.8 6.7 4.3 2.9 45% 28 18.2 12.0 8.2 5.1 Stranded Cable Lgth. (ft.) 5 10 40 80 Wire Gauge (AWG) 18 16 14 12 10 18 16 14 12 10 18 16 14 12 10 8 18 16 14 12 10 8 Power Loss (8 ohm load) 0.81% 0.51 0.32 0.20 0.128 1.61% 1.02 0.64 0.40 0.25 6.2% 4.0 2.5 1.60 1.01 0.60 11.9% 7.7 5.0 3.2 2.0 1.20Power Loss (4 ohm load) 1.61% 1.02 0.64 0.40 0.25 3.2% 2.0 1.28 0.80 0.51 11.9% 7.7 5.0 3.2 2.0 1.20 22% 14.6 9.6 6.2 4.0 2.4 Power Loss (2 ohm load) 3.2% 2.0 1.28 0.80 0.51 6.2% 4.0 2.5 1.60 1.01 22% 14.6 9.6 6.2 4.0 2.4 37% 26 17.8 11.8 7.7 4.7