Highest performance, Omni-directional, pre-amplified microphone for fixed location security applications. Built in adjustable compressor circuit automatically lowers the output level during loud sound intervals. Also features adjustable high and low cut filters that can significantly reduce background noise. 12-24vdc power input and an adjustable output level in 2 ranges.

Features:

• Ultra low noise / high sensitivity Adjustable high and low frequency cut off filters. Useful for reducing back ground noise.
• Adjustable automatic level control with a compression ratio range of1:1 to 10:1. The circuit automatically lowers the gain in loud environments and when quiet, raises the gain where faint audio sources such as people whispering can be heard. 
• Omni-Directional 25' pickup pattern.
• Low noise MOSFET pre-amplifier.
• 80db S/N ratio, -28db sensitivity ECM capsule.
• 500Hz-16Khz Frequency response (hi-cut and lo-cut off)
• Adjustable lo-cut filter: (500hz to 1Khz)
• Adjustable hi-cut filter: (5Khz to16Kz)
• Adjustable automatic gain control. (compression range 1:1-10:1).
• Adjustable output level (post AGC).
• 100 Ohm unbalanced output.
• Treble boost pre-emphasis.
• 3 position terminal block.
• Power: 12-24vdc @15mA.
• On-board voltage regulators and RFI filtering.
• Stainless steel plate mounts flush or on a single gang electrical box.
• Industrial temperature range: -40C to 85C.
• Dimensions: L 4.7” x W 2.9” H 0.9”
• Weight .1lbs

Includes:

• SM1-PESS-LN Microphone.
• Mounting screws.
• Warning label.
• Installation instructions.