The SM1-PA is a microphone pre-amplifier designed to be used with any of our ML1 series microphones. It features a 12-24vdc power input, hi and lo cut filters and an adjustable gain control. The output of the SM1-PA is designed to be connected directly to ETS base stations, interfaces and other equipment.

Features:

• 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
• Temperature range -25C to 85C.
• Black plastic ABS housing.
• Dimensions: L 2.7 x W 1.7 x H 1.6
• Weight .05lbs

Includes:

• SM1-PA Pre-amplifier
• Installation instructions.

Wiring requirements:

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