User manual CREST AUDIO MM 623 PROGRAM AUDIO MIXER SPECIFICATIONS

[. . . ] MMTM 623 Program Audio Mixer SERIES Output Specifications: Output Left/Right Min Load Impedance 600 Ohms Output Level Nom +4 dBu Max +21 dBu +19 dBm +21 dBu +19 dBm Balanced UnBalanced Balanced Connector + Ground + Ground Aux 600 Ohms +4 dBu Balanced 0 dBu = 0. 775 V (rms) 0 dBu = 1 mW Features · six balanced mic/line inputs (transformer optional ) · mic/line inputs assignable per channel to L, R and Aux buses · channel one mute capability, variable threshold · two selectable RCA stereo or mono line inputs · three electronically balanced line outputs: Master L, R and Aux · four-band EQ on Master L, R out · remote Master level control · euro style I/O connectors · 48 VDC phantom power, selectable per channel · remote stereo input select or remote stereo mute Description The MM 623 is a versatile, high quality mixer designed with the professional in mind. Offering six microphone inputs, two selectable stereo inputs, and such features as bus assignment, phantom power, remote master, Left, Right, and Aux outputs, this compact unit is perfectly suited to modern diverse applications. [. . . ] The MM 623 offers a multitude of features in one EIA rack space. Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications. 9/5/01 v. 1. 5 *A4500019* Crest Audio Inc. Fair Lawn, NJ 07410 TEL: 201. 909. 8700 FAX: 201. 909. 8744 www. crestaudio. com Specifications Test Conditions: Input Specifications: Input Impedance (Ohms) 2k Input gainpot setting Max gain +60 dB Min gain +10 dB Max gain +40 dBu Min gain -10 dB Max gain +60 dB Min gain +20 dB Max gain +40 dB Min gain 0 dB N/A MMTM 623 Program Audio Mixer Specifications gain MMTM 623 Program Audio Mixer MM 623 program audio mixer Mic input range without pad: 10 dB to 60 dB Mic input to output without pad: 80 dB max Mic input range with pad: -10 dB to 40 dB Mic input to output with pad: 60 dB max Mic input range without pad (optional transformer): 20 dB to 60 dB Mic input to 0utput without pad (optional transformer): 80 dB max Mic input range with pad (optional transformer): 0 dB to 40 dB Mic input to output with pad (optional transformer): 60dB max 120 Vac 60 Hz maintained throughout testing. Input Level, dBu Min. * -76 dBu -25 dBu -56 dBu -5 dBu -74 dBu -34 dBu Nom. ** -56 dBu -4 dBu -36 dBu +16 dBu -54 dBu -14 dBu Max. -39 dBu Balanced +13 dBu -19 dBu Balanced +33 dBu -37 dBu Balanced +3 dBu Balanced/ Unbalanced Connector + Ground + Ground + Ground Input Microphone without pad frequency response 20 Hz - 20 kHz+0 dB/-1 dB Microphone with pad 2k total harmonic distortion and noise <0. 1% typical 20 Hz - 20 kHz; Mic to L-R out (22 Hz - 22 kHz BW) -128 dBu Mic input terminated with 150 Ohms >70 dB typical 20 Hz - 20 kHz >70 dB typical adjacent channels (1 kHz) >60 dB typical output to output (1 kHz) +48 Volts at mic + and - inputs equivalent input noise (EIN) Microphone without pad (optional transformer) Microphone with pad (optional transforme)r Stereo Line 2k common mode rejection ratio (mic input) crosstalk 2k -54 dBu -14 dBu -20 dBV -34 dBu +6 dBu -10 dBV -17 dBu Balanced +23 dBu +7 dBV Unbalanced + Ground RCA jacks phantom power remote volume control 10k Ohm potentiometer 30 dB attenuation 100k Ohm potentiometer 60 dB attenuation 10k 0 dBu = 0. 775 V (rms) 0 dBu = 1. 00 V (rms *Min. input level (sensitivity) is the smallest signal that will produce a nominal output with controls set at maximum gain. **Nominal settings are defined as all controls set at center detent for nominal output. Microphone gain control is as specified. channel mute >60 dB attenuation signal/clip indicators Input Channel Status: Green: -20 dBu Red: 2 dB below clipping Output Level Meters: -24: -20 dBu -6: -2 dBu 0: +4 dBu +6: +10 dBu Clip: 2 dB below clipping Noise: Output Left/Right Signal/Noise (typical) 100 dB 84 dB 80 dB Test Conditions All level controls down Master level control nominal Channel level controls down All controls nominal All channels assigned Mic gain minimum All level controls down Master level control nominal Channel level controls down All controls nominal All channels assigned Mic gain minimum power requirements Domestic: 120 Vac, 60 Hz 15 Watts nominal Export: 230 Vac, 50/60 Hz 15 Watts nominal dimension (H x W x D) 1. 75" x 19" x 8. 75" (45 mm x 483 mm x 222 mm) Aux 95 dB 92 dB 81 dB weight 7. 4 pounds (3. 4 kg) Architects' & Engineers' Specifications: The mixer shall have six electronically balanced microphone or line inputs. The mixer shall also have two stereo unbalanced line inputs. All inputs shall be routable to any or all of three master buses, Left, Right and Aux. Each microphone input shall include selectable 48 Volt phantom power. Channel one shall have a variable mute threshold over all other channels. Each input shall have a Signal/Clip indicator that activates green at -20 dB, and turns red at 2 dB below clipping. The mixer shall have three electronically balanced outputs, Left, Right and Aux, each with its own master output control and five LED meter array. [. . . ] The mixer shall be capable of driving +21 dBu into a balanced load from the Left, Right or Aux outputs, from 20 Hz to 20 kHz. +0 to -2 dB into 600 Ohms with less than 0. 1% distortion and with system hum and noise at least 80 dB below rated output. [. . . ]