The SM1-UPM is a pre-amplified, panel mount, Uni-directional, moisture resistant, microphone for indoor applications. Built in limiter circuit automatically lowers the output level during loud sound intervals. Selectablelo-cut and hi-cut filters significantly reduce background noise.

Features:

• Uni-directional 25’ pickup pattern.
• -12db attenuation on all sides.
• Low noise MOSFET pre-amplifier.
• Moisture resistant
• 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
• 6ft standard length cord w/3.5mm connector
• Temperature range –40 to 85C
• ML1-UPM Dimensions: L 1.75 x D 0.75
• SM1-PA Dimensions: L 3.3 x W 2.0 x H 1.6
• Weight .1lbs

Includes:

• ML1-UPM Microphone.
• 2 Gaskets and nut
• SM1-PA Pre-Amplifier
• Warning label
• Installation instructions

Options:

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