High performance, Omni-directional, pre-amplified microphone for fixed location security applications. 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. Connects directly to our switcher / mixer / amplifiers or use one of our many interface products to make fast and clean connections to DVRs, IP cameras and remote monitoring equipment.

Features:

• Omni-directional 25’ pickup pattern.
• Low noise MOSFET pre-amplifier.
• 500Hz-16Khz Frequency response.
• Switch selectable hi-cut/low-cut filters limit frequency response to 900-6khz significantly reducing background noise.
• Switch 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 terminal block.
• PTCC fused and 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 85C.
• Stainless steel plate mounts flush or on a single gang electrical box.
• Dimensions: L 4.5” W 2.7” H 1.1”
• Weight .08

Includes:

• SM1-SS flush mount microphone.
• Mounting screws.
• Warning label.
• Installation instructions.

Options:

• See Pre-amplifier board selection guide for alternate pre-amplifier form factors.
• Add –LN to P/N for ultra low noise (80db) and high sensitivity (–28db) microphone capsule 

Wiring requirements:

• 2 conductor shielded (with drain wire) 22 gauge stranded. Max cable length 1000’