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Crest Audio Stereo Amplifier manual

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  • Page 1

    PROFESSIONAL PO WER AMPLIFIERS O WNER’S MANU AL Including MA Series Amplifier s Ch B -1 0dB -3 -6 -10 -15 -30 -80 Ch A -1 0dB -3 -6 -10 -15 -30 -80 8001 Professional Power Amplifier Clip/Limit Signal Temp/DC Active Clip/Limit Signal T emp/DC Active HIGHS -1 0dB -3 -6 -10 -15 -30 -80 7301 Professional Power Amplifier LOWS -1 0dB -3 -6 -10 -15 -30 [...]

  • Page 2

    1. Sav e the carton and packing material even if the equipment has arri ved in good condition. Should you ev er need to ship the unit, use only the original factory packing. 2. Read all documentation befor e oper- ating your equipment. Retain all docu- mentation for future reference. 3. Follo w all instructions printed on unit chassis for proper op[...]

  • Page 3

    Crest A udio Pro Series P ower Amplifiers P age 1 P o wer Amplifier Owner’ s Manual T ab le of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Co[...]

  • Page 4

    P age 2 Crest A udio Pro Series P ower Amplifiers Intr oduction Congratulations...on your purchase of a Crest Audio Professional Series po wer amplifier . Designed for years of reliable, flawless oper- ation under rigorous use. These po wer amplifiers of fer the sonic superiority and unsurpassed reliability for which Crest Audio is famous, while re[...]

  • Page 5

    Crest A udio Pro Series P ower Amplifiers P age 3 Cooling Requirements The Professional Series amplifiers use a forced-air cooling system to maintain a lo w , ev en operating temperature. Air is drawn into the amplifier by f an(s) on the rear panel, courses through the cooling fins of the back-to-back (tunnel-conf igured) channel heat sinks, and th[...]

  • Page 6

    P age 4 Crest A udio Pro Series P ower Amplifiers PUSH PUSH WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. ATTENTION! POUR ÉVITER LE RISQUE D'INCENDIE OU DE CHOC ÉLECTRIQUE, NE PLACEZ PAS CET APP AREIL SOUS LA PLUIE OU Á L'HUMIDITÉ RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION AVIS [...]

  • Page 7

    Crest A udio Pro Series P ower Amplifiers P age 5 USA ONL Y MODEL # MAXIMUM INPUT CURRENT @ 120V , 60Hz OUTPUT POWER IN WA TTS PER CHANNEL, 2 Ω OUTPUT - CLASS 2 WIRING MA Y BE USED 7301 21 AMPS CH. A 990W CH. B 220W RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION AVIS : RISQUE DE CHOC ÉLECTRIQUE—NE P AS OUVRIR WARNING TO REDUCE THE RISK OF FIRE OR [...]

  • Page 8

    P age 6 Crest A udio Pro Series P ower Amplifiers Ch B -1 0dB -3 -6 -10 -15 -30 -80 Ch A -1 0dB -3 -6 -10 -15 -30 -80 8001 Professional Power Amplifier Clip/Limit Signal T emp/DC Active IN B IN A PIN 3+ A B STEREO BRIDGE PARALLEL SIGNAL GROUND LIFT -- OUT A + -- OUT A + + BRIDGE -- + BRIDGE -- + OUT B -- + OUT B -- USA ONL Y MODEL # 8001 30 AMPS MA[...]

  • Page 9

    Crest A udio Pro Series P ower Amplifiers P age 7 Ch B -1 0dB -3 -6 -10 -15 -30 -80 Ch A -1 0dB -3 -6 -10 -15 -30 -80 9001 Professional Power Amplifier Clip/Limit Signal T emp/DC Active PUSH PUSH MODEL 9001 MAXIMUM OUTPUT POWER PER CHANNEL 8 Ω 1200 WA TTS 4 Ω 2200 WA TTS DO NOT OPERATE WITHOUT THIS PROTECTIVE COVER NEXSYS OUTPUT SAMPLE RISK OF [...]

  • Page 10

    P age 8 Crest A udio Pro Series P ower Amplifiers Clip/Limit Signal T emp/DC Active 10001 Professional Power Amplifier Clip/Limit Signal T emp/DC Active Ch A -1 0dB -3 -6 -10 -15 -30 -80 Ch B -1 0dB -3 -6 -10 -15 -30 -80 OUT B + - AC MAINS-INPUT CH. B AC MAINS-INPUT CH. A OUT A + - NEXSYS OUTPUT SAMPLE PUSH PUSH RISK OF ELECTRIC SHOCK DO NOT OPEN C[...]

  • Page 11

    Crest A udio Pro Series P ower Amplifiers P age 9 10004 Professional Power Amplifier Ch A -1 0dB -3 -6 -10 -15 -30 -80 Ch D -1 0dB -3 -6 -10 -15 -30 -80 Clip/Limit Signal T emp/DC Active Ch B -1 0dB -3 -6 -10 -15 -30 -80 Ch C -1 0dB -3 -6 -10 -15 -30 -80 Clip/Limit Signal T emp/DC Active AC MAINS-INPUT CH. C & D AC MAINS-INPUT CH. A & B WAR[...]

  • Page 12

    P age 10 Crest A udio Pro Series P ower Amplifiers Connecting Inputs Input connections are made via the 3-pin XLR connectors (pin 3+) on the rear panel of the amplifier . The inputs are activ ely balanced. Pinout and polarity of connection cables should be configured as sho wn at the right. The input o verload point is high enough to accept the max[...]

  • Page 13

    Crest A udio Pro Series P ower Amplifiers P age 11 Connecting P ower Professional Series po wer amplifier po wer requirements are rated at: a) “idle” b) 1/8th power (“typical” music conditions) c) 1/3rd po wer (“continuous” music conditions) d.) maximum rated po wer . The maximum po wer current draw rating is limited only by the front p[...]

  • Page 14

    P age 12 Crest A udio Pro Series P ower Amplifiers Bridging Precautions Use extreme caution when operating the amplif ier in the bridged mode; as potentially lethal voltage may be present at the output ter- minals. Ne ver ground either side of the speaker cable when the amplif ier is in the bridged mode; both sides are hot. If an output patch panel[...]

  • Page 15

    Crest A udio Pro Series P ower Amplifiers P age 13 Indicators Professional Series amplifiers feature four front panel LED indicators per channel: Clip/Limit, Signal, T emp/DC, and Activ e. These LED indicators inform the user of each channel’ s operating status and warn of possible abnormal conditions. Clip/Limit LED A channel’ s Clip/Limit LED[...]

  • Page 16

    P age 14 Crest A udio Pro Series P ower Amplifiers Thermal Protection The internal fan(s) will keep the amplif ier operating well within its intended temperature range under all normal conditions. If a chan- nel’ s heat sink temperature reaches 75°C, (85°C for Models 7001 and 8001) which may indicate an obstructed air supply , clogged air filte[...]

  • Page 17

    Crest A udio Pro Series P ower Amplifiers P age 15 All loudspeakers ha ve electrical, thermal, and physical limits which must be observed to pre vent damage or f ailure. T oo much power , low frequencies applied to high frequenc y drivers, severely clipped w aveforms, and DC v oltage can all be fatal to cone and compres- sion dri v ers. The Crest A[...]

  • Page 18

    Appendix A Crest A udio Pro Series P ower Amplifiers non-inverting inverting ground non-inverting inverting ground Octal accessory socket Mode switch B P S Channel A Channel B Preamp Preamp Attenuator Attenuator Amp front end Amp front end Output stage Output stage Output relay Output relay Appendix A - Prof essional Series Block Diagram The block [...]

  • Page 19

    Crest A udio Pro Series P ower Amplifiers Appendix B † USA, Canada, U.K., and many other countries. Power f igures are watts per channel, both channels driv en. Crest Audio reserves the right to make improv ements in manufacturing or design which may affect specifications. Crest Audio specif ication literature is av ailable in downloadable PDF f [...]

  • Page 20

    Appendix B Crest A udio Pro Series P ower Amplifiers 1kHz, <0.012% THD+N 20Hz-20kHz, <0.05% THD+N 350W 300W 485W 425W 925W 825W 59V 83.4V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input. <0.012% <0.1% 400:1 >60 dB 1.03V RM[...]

  • Page 21

    Crest A udio Pro Series P ower Amplifiers Appendix 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 T emp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input. <0.025% <0.1% 400[...]

  • Page 22

    Appendix B Crest A udio Pro Series P ower Amplifiers † USA, Canada, U.K., and many other countries. Power f igures are watts per channel, both channels dri ven. Crest Audio reserves the right to make improv ements in manufacturing or design which may affect specifications. Crest Audio specif ication literature is av ailable in downloadable PDF f [...]

  • Page 23

    Crest A udio Pro Series P ower Amplifiers Appendix B 1kHz, <0.02% THD+N 20Hz-20kHz, <0.05% THD+N 560W 550W 810W 715W 1650W 1510W 850W 850W 1700W 1600W 83V 117V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input. <0.02% <0.1% 400[...]

  • Page 24

    Appendix B Crest A udio Pro Series P ower Amplifiers Lows @ 100Hz, <0.1% THD+N Highs @ 1kHz, <0.05% THD+N 940W 240W 990W 220W 940W 125W 670W 95W 83V(Lo w Ch.) 49V(High Ch.) 117V(Lo w Ch.) 69V(High Ch.) 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC voltage, turn-on/off transient, su[...]

  • Page 25

    Crest A udio Pro Series P ower Amplifiers Appendix B 1kHz, <0.025% THD+N 20Hz-20kHz, <0.1% THD+N 750W 720W 1225W 1200W 2450W 2250W 1400W 1400W 2800W 2800W 91V 129V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC voltage, turn-on/of f transient, sub/ultrasonic input. <0.025% <0.[...]

  • Page 26

    Appendix B Crest A udio Pro Series P ower Amplifiers 1kHz, <0.02% THD+N 20Hz-20kHz, <0.1% THD+N 1200W 1100W 2200W 2050W 4400W 4100W 3300W 3000W 6600W 6000W 114V 161V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input. <0.02% 0.05% [...]

  • Page 27

    Crest A udio Pro Series P ower Amplifiers Appendix B 20Hz-20kHz, <0.1% THD+N T ypical Music Pr og. Material 3500W 5000W 5000W 7500W 7000W 10,000W 10,000W 15,000W 105V 150V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2 dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input. <0.02% 0.[...]

  • Page 28

    Appendix B Crest A udio Pro Series P ower Amplifiers 1kHz, <0.02% THD+N 20Hz-20kHz, <0.1% THD+N 750W 720W 1225W 1200W 2450W 2400W 1400W 1400W 2800W 2800W 91V 137V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC voltage, turn-on/off transient, sub/ultrasonic input. <0.02% 0.06% 600[...]

  • Page 29

    Crest A udio Pro Series P ower Amplifiers Appendix C Appendix C - Wire Gauge Char ts Stranded Cable Lgth. (m) 2 5 10 30 Wire 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 [...]

  • Page 30

    Appendix D Crest A udio Pro Series P ower Amplifiers The Crest Audio Models MA5850, MA9130, and MA7120 Professional power amplif iers are specifically designed in close coopera- tion with Meyer Sound Laboratories to meet the needs of the European Me yer Sound loudspeaker user . This manual describes all of the important aspects of amplifier install[...]

  • Page 31

    Crest A udio Pro Series P ower Amplifiers Appendix D 1kHz, <0.025% THD+N 20Hz-20kHz, <0.1% THD+N 750W 720W 1225W 1200W 2450W 2250W 1400W 1400W 2800W 2800W 91V 129V 20 Hz-20 kHz, -3dB @ 53kHz 20 Hz-20 kHz, +0/-0.2dB Clip Limit, IGM, AutoRamp, High T emp, short-circuit, DC volt- age, turn-on/off transient, sub/ultrasonic input. <0.025% <0[...]

  • Page 32

    P o wer is serious business. v . 1.6 12/15/97 © 1997 Crest Audio, Inc. Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL : 201.909.8700 FAX : 201.909.8744 http://www.crestaudio.com Printed in USA *C1000005*[...]