The BM 4 features 4 Mic/line inputs with microphone input 1 featuring a mute so that a Microphone on this channel will mute all other inputs, useful for paging announcements. The BM 4 provides a mono output. There are 4 alarm triggers: CHIME, ALERT, BELL and EVAC, connected via external mounted screw terminals. The mixer is part of inDESIGN’s Install Series, which also includes mixer amplifiers and power amplifiers. These units provide excellent features and value. Specifications Mic Inputs  Connectors (Mic/Line): Euro Block / RCA Impedance (Mic/Line): 1kO / 13.6kO Gain (Mic/Line): 20dB to 50dB / 0dB to 20dB Max Input Level (Mic/Line): -28dBu / +10dBu Frequency Response: 20Hz – 20kHz S/N: -86dBu THD+N: 0.3% (20Hz – 20kHz, +4dBu) Phantom Power: 48V Tone Frequency/Control Range: 100Hz / 10kHz Balanced Outputs  Output Impedance (Mic/Line): 51.1O / 150O Max. Output (Mic/Line): -16dBu / +24dBu S/N: 90dB THD+N: 0.01% (20Hz – 20kHz, +4dBu) Crosstalk: -75dB @ 1kHz Mains Voltage: 240 VAC, 50/60Hz, 10 Watts Unit  Construction: All Steel Size: 4.4cm x 48.3cm x 16cm Weight: 1.8kg Note: 0 dBu = 0.775 Vrms
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