High performance, Unidirectional pre-amplified microphone for use where side noise must be reduced. Simply mount the SM1-U in the direction of interest. Built in limiter circuit automatically lowers the output level during loud sound intervals. Selectable lo-cut and hi-cut filters further significantly reduce background noise. Flexible plastic plate mounts flush or on a single gang electrical box.

Features:

• Uni-directional 25' pickup pattern with reduced (-6db) sensitivity on all sides.
• Low noise MOSFET pre-amplifiers.
• S/N ratio: more than 60DB
• Sensitivity –45DB
• 500Hz-16Khz Frequency response.
• Switch selectable hi-cut/lo-cut filters limit frequency response to up to 900 to 6Khz significantly reducing background noise.
• Switch selectable volume range: "Line level" (0db) or "Microphone level" (-30db)
• Adjustable gain in both volume ranges.
• Internal peak limiter circuit (.5 sec response)
• 100 Ohm unbalanced output.
• 3 position terminal block.
• Power: 12 to 24VDC @ 10mA.
• PTCC fused and reverse polarity protected
• On-board voltage regulator and RFI filtering.
• Temperature range: -40C to 85C
• Flexible plastic plate mounts flush or on a single gang electrical box.
• Dimensions: L 4.7” x W 2.9” H 1.9”
• Weight .04lbs

Includes:

• SM1-U Flush mount microphone.
• Warning label.
• Installation instructions

Options:

• See Pre-amplifier board selection guide for alternate pre-amplifier form factors.
• Add –BK to P/N for black enclosure