4 SM1 Microphones, SM4 Switcher/Mixer/Amplifier. Complete 4 zone, manual switching, audio surveillance system. Can be used independently for monitoring live audio or with tape recorders / DVRs for recording and playback. Two modes of operation: Switcher (select one of 4 zones) or mixer (select any combination of zones).

SM1 Microphone

Omni-directional element w/25’ range

Low noise MOSFET preamplifier

Line level, unbalanced output

Adjustable gain

Treble boost circuit. Selectable on/off

Enhances clarity of time lapse recordings

Limiter circuit. Selectable on/off

3 position Euro-style connector makes cable termination fast and clean

Flush mount

Power: 12 VDC @ 10mA

SM4 Switcher / Mixer

In/out switches and level controls for each microphone channel

Standard RCA jacks for connection to tape recorders, DVRs, etc

All settings stored in non-volatile memory

1 Watt power amplifier & 3” speaker

Euro-style connectors makes cable terminations fast and clean

Tape monitor switch

3.5mm Headphone jack

Power: 12 VDC @ 250mA

SM7 Data Sheet

(Size: 45.1 KB)

SM7 Data Sheet

(Size: 45.1 KB)

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