User manual CREST AUDIO MULTIPLEX 900 SPECIFICATIONS

[. . . ] Multiplex 900 power amplifier description The Crest Audio Multiplex 900 integrates cost-effective design with exceptional sonic accuracy, long-term reliability, and the basic features required for cinema sound applications. The Multiplex 900's remarkable price/performance ratio is the result of innovative engineering and highly efficient manufacturing in Crest's modern USA facility along with nearly two decades of leadership in professional amplifier design. [. . . ] more effective cooling ­ large, extruded aluminum heatsink and front-mounted, two-speed 4-inch fan prolonging amplifier life by minimizing internal temperatures. front panel magnetic circuit-breaker/power switch rear panel knobs attenuators (with cover) differentially-balanced ¼-inch TRS and Barrier Strip Input Connectors five-way binding post or Speakon output connectors (market dependent) LED indicators ­ SIGNAL PRESENT, CLIP, ACTIVE, and PROTECT stereo/bridged-mono mode select switch five-year warranty* . . . . . TourClass® protection circuits acl active clip limiting prevents speaker damage by providing gentle gain reduction at the clipping threshold. power specifications: other Multiplex Series power amplifiers 4 stereo 1kHz, 0. 01% THD+N igm instantaneous gain modulation monitors speaker loads to detect conditions that may overstress output devices, allowing safe operation into difficult impedances. Multiplex 1500 Multiplex 1100 autoramp gradually increases gain to the attenuator levelsettings when the amplifier is turned on. Protection features include: thermal runaway, input overload, dc, short circuit, in-rush current, and turn-on/turn-off transients. 550w 750w power specifications 8 stereo 230w 4 stereo 400w 8 bridged 800w Power figures are watts per channel, both channels driven. 900 1kHz, 0. 01% THD+N specifications stereo power 8 4 bridged mono power 8 maximum output voltage frequency response 1W @ 8 power bandwidth rated power @ 4, 1% THD+N THD+N SMPTE IMD Multiplex 900 power amplifier architect's specifications The power amplifier shall have two channels. Each channel shall deliver a minimum of 230W at 8 and400W at 4, both channels driven, 20Hz­20kHz, <0. 1% THD+N. In bridged-mono mode, it shall deliver 800W at 8, <0. 1% THD+N. The amplifier shall have circuitry to protect itself and the speaker load from output short circuits, DC voltage on outputs, and thermal overload. The amplifier shall include circuitry to gradually increase gain to attenuator setting levels when the amplifier is turned on, and circuitry for impedance sensing and clip limiting. The amplifier shall have a voltage gain of X40 with an input sensitivity of 1. 0V, for rated power at 8. The hum and noise level shall be greater than 105dB below rated output, A-weighted. SMPTE IMD shall be less than 0. 1%, rated power at 8. The amplifier shall have a class AB output. The frequency response shall be greater than 20Hz­20kHz, +0/-0. 3dB (1W/8). The amplifier shall operate at 100­240VAC, 50­60Hz (configured at factory). [. . . ] 1. 0 *A4500006* 7/28/98 Crest Audio Inc. 100 Eisenhower Dr. , Paramus NJ 07652 USA TEL: 201. 909. 8700 FAX: 201. 909. 8744 http://www. crestaudio. com [. . . ]