SM1-TR Omni-directional Pre-amplified Microphone


Product Description

High performance, Omni-directional, pre-amplified microphone for fixed location security applications where vandalism is of concern. Electret element is mounted in a special housing which is out of reach to objects inserted into the sound holes. 25’ pickup pattern in all directions. Built in limiter circuit automatically lowers the output level during loud sound intervals. Hi cut and low cut filters significantly reduce background noise. Stainless steel plate mounts flush or on a single gang electrical box.

SM1-TR Specifications

  • Omni-directional 25’ pickup pattern
  • Low noise MOSFET pre-amplifier
  • 500Hz-13Khz Frequency response
  • Jumper selectable hi-cut/low-cut filters limit frequency response to 900-6khz significantly reducing background noise
  • Jumper selectable volume range: “Line level” (0db) or “Microphone level” (-30db)
  • Adjustable gain in both volume ranges
  • 100 Ohm unbalanced output
  • Internal peak limiter circuit (.5 sec response)
  • 3 position Euro-style connector makes cable termination fast and clean
  • Reverse polarity protected
  • Power: 12 to 24VDC @ 10mA
  • On-board voltage regulator and RFI filtering
  • S/N ratio: more than 60DB
  • Sensitivity –45DB
  • Industrial temperature range –40 to 105C
  • Stainless steel plate mounts flush or on a single gang electrical box
  • Dimensions: L 4.5” W 2.7” H 1.1”
  • Weight .07lbs