User manual CREST AUDIO CA

[. . . ] PROFESSIONAL POWER AMPLIFIERS Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier OWNER' S MANUAL Important Precautions This symbol is used to alert the operator to follow important operating procedures and precautions detailed in documentation. This symbol is used to warn operators that uninsulated "dangerous voltages" are present within the equipment enclosure that may pose a risk of electric shock. 10. Power down & disconnect units from mains voltage before making connections. Never hold a power switch in the "ON" position if it won't stay there itself! [. . . ] Unless otherwise specified when ordered, Crest amplifiers shipped to customers are configured as follows: North America Europe Asia Australasia South America Japan 120VAC / 60Hz 230VAC / 50Hz 220VAC / 50Hz 240VAC / 50Hz 120VAC / 60Hz or 220VAC / 50Hz 100VAC / 50Hz NOTE: Always turn off and disconnect the amplifier from mains voltage before making audio connections. Also, as an extra precaution, have the attenuators turned down during power-up. CA Series amplifiers use a twin-tunnel forced-air cooling system to maintain a low, even operating temperature. Drawn in by dual 45 cubic feet-per-minute (CFM) fans on the rear panel, air flows through the cooling fins of the channel heat sinks (dissipating power transistor heat), then exhausts through the front panel slots. The "intelligent" variable-speed DC fans are controlled by heat sink temperature-sensing circuits. When the amplifier is turned on, the fans briefly "rev up, " then slow to an idle; this indicates that the temperature sensing circuits are operating normally. The fan speed increases only as required by heat sink temperatures, keeping fan noise to a minimum. Under extreme thermal load, the fans will force a very large volume of air through the heat sinks. If either heat sink surpasses the maximum allowed temperature, the sensing circuit will open the output relay, disconnecting the load from that channel. If the power transformer overheats, another sensing circuit opens both channel output relays until the transformer cools to a safe temperature. IMPORTANT: To ensure optimum cooling, periodically clean the amplifier fan filters (removable without tools). Also make certain that there is enough space around the front of the amplifier to allow the cooling air to escape. If the amplifier is rack-mounted, do not use doors or covers on the front of the rack; the exhaust air must flow out without resistance. If the amplifiers are to be housed in racks with closed backs, allow at least one (1) standard rack space of opening in the front of the rack for every four amplifiers. Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Page 9 Connecting Inputs. Use either the XLR or 1/4-inch input connectors on the rear to supply audio signals to your Crest Audio CA Series amplifier. Both connectors accept balanced and unbalanced audio connections. (The CA Series amplifiers are configured standard with "Pin 2 hot" on XLR inputs. Please note that some other Crest Audio amplifiers are configured with "Pin 3 hot"). The unused connector can be used to jumper the audio input to another amplifier input. For more information, see the sections on Balanced 1/4" (TRS) & XLR Input Connectors, Input XLR Polarity, and Input Sensitivity. Speakers are connected using 5-way Output Binding Posts or Speakon connectors, depending on version supplied. Please note that on the 5-way Output Binding Post version of the CA18, two pairs of 5-way binding posts are provided for each channel, so that paralleling of speakers is possible. [. . . ] Draw (typical music cond. , 120V/4) 1/3 Power Curr. Draw (continuous music cond. , 120V/4) Thermal Emissions (1/8 Power, 4) Thermal Emissions (1/3 Power, 4) Cooling Controls LED Indicators (per channel) Construction Dimensions (Height x Width x Depth to rear rack ears) Gross Weight Net Weight Warranty 3. 5" x 19" x 18" 89 x 483 x 457mm 38 lbs. (14. 98 kg) 5 years* 3. 5" x 19" x 18" 89 x 483 x 457mm 46 lbs. (18. 61 kg) 5 years* 20, 000 µF 100V-240V, 50-60Hz 1. 2A 3. 25A 5. 5A 9. 0A 1119 BTU/hr 1607 BTU/hr 27, 200 µF 100V-240V, 50-60Hz 1. 4A 6. 8A 10. 0A 15. 0A 2030 BTU/hr 2726 BTU/hr <0. 01% <0. 01% 368:1 > - 60 dB 0. 775V X45 >20k/>10k -105dB > - 60dB AB 150W 200W N/A 450W N/A 44V 62V 20Hz-20kHz, -3dB@135kHz 20Hz-20kHz, -. 9dB/+. 15dB 245W 400W 450W 800W 900W 58V 82V 20Hz-20kHz, -3dB@135kHz 20Hz-20kHz, -. 9dB/+. 5dB <0. 01% <0. 01% 550:1 > - 60 dB 0. 775V X61 >20k/>10k -105dB > - 60dB AB 350W 500W 600W 1000W 1200W 73V 103V 20Hz-20kHz, -3dB@135kHz 20Hz-20kHz, -1. 1dB/+0dB <0. 01% <0. 01% 400:1 > - 60 dB 0. 775V X68 >20k/>10k -105dB > - 60dB H 550W 800W 900W 1600W 1800W 82V 116V 20Hz-20kHz, -3dB@135kHz 20Hz-20kHz, -. 84dB/+0dB <0. 01% <0. 01% 700:1 > - 60 dB 0. 775V X86. 5 >20k/>10k -105dB > - 60dB H 650W 1100W 1100W 2200W 2200W 90V 126V 20Hz-20kHz, -3dB@135kHz 20Hz-20kHz, -. 23dB/+. 85dB <0. 01% <0. 01% 800:1 > - 60 dB 0. 775V X97. 5 >20k/>10k -105dB > - 60dB H 950W 1700W 2400W 3400W 4800W 99V 140V 20Hz-20kHz, -3dB@150kHz 20Hz-20kHz, -. 2dB/+. 2dB <0. 03% <0. 01% 800:1 > - 70dB 0. 775V X115 >20k/>10k -115dB > - 80dB H 160W 250W N/A 500W N/A 250W 435W 500W 830W 1000W 400W 600W 750W 1200W 1500W 600W 900W 1000W 1800W 2000W 700W 1200W 1400W 2400W 2800W 1000W (. 03% THD+N) 1800W (. 03% THD+N) 2500W (. 03% THD+N) 3600W (. 03% THD+N) 5000W (. 03% THD+N) ACL, IGM, AutoRamp, short circuit, DC voltage, turn-on/off transient, current inrush, sub/ultrasonic input Female XLR (pin 2+, configurable for pin 3+), TRS (tip+) 5-way binding posts (2 pair on CA18) or Speakon connectors (market dependent) 68, 000 µF 100V-240V, 50-60Hz 1. 6A 6. 0A 13. 0A 18. 0A 2630 BTU/hr 3713 BTU/hr 80, 000 µF 100V-240V, 50-60Hz 2. 0A 8. 6A 16. 0A 21. 0A 3250 BTU/hr 4341 BTU/hr 140, 000 µF 100V-240V, 50-60Hz 2. 8A 10. 5A 23. 0A 30. 0A 4750 BTU/hr 6300 BTU/hr 144, 000 µF 100V-240V, 50-60Hz 3. 0A 12. 0A 25. 0A 36. 0A 7125 BTU/hr 9450 BTU/hr Two rear panel variable speed DC fans, filters detatchable without tools Front panel: 2 attenuators, magnetic circuit breaker/power switch; Rear panel: signal ground lift & mode switches; CA18: XLR polarity & input sens. /voltage gain switches) Clip/Limit, Signal, Temp/DC, Active Steel chassis, 16 gauge. 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