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InDesign BM4 4-Channel Strip Mixer / Pre-Amplifier

Manufacturer: Other
The inDESIGN BM4 is a high quality mixer for commercial and industrial audio applications.
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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.


Mic Inputs

  • Connectors (Mic/Line): Euro Block / RCA
  • Impedance (Mic/Line): 1kΩ / 13.6kΩ
  • 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): 51.1Ω / 150Ω
  • 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


  • Construction: All Steel
  • Size: 4.4cm x 48.3cm x 16cm
  • Weight: 1.8kg

Note: 0 dBu = 0.775 Vrms


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