The SM1-PAP is a high performance microphone pre-amplifier designed to be used with any of our ML1 series microphones. It features a 12-60Vdc or 9-42Vac power input, adjustable Hi and Lo cut filters and an adjustable automatic gain control. The output of the SM1-PAP is designed to be connected directly to ETS base stations, interfaces and other equipment.

Features: 

• Low noise MOSFET pre-amplifier.
• 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).
• Switch selectable volume range: "Line level" (0db) or
• "Microphone level" (-30db) 
• Adjustable output level (post AGC).
• 100 Ohm unbalanced output.
• Treble boost pre-emphasis.
• 3 position Euro-style connector makes cable termination fast and clean.
• Power: 12-60VDC or 9-42VAC @15mA.
• On-board voltage regulators and RFI filtering.
• Temperature range -25C to 85C.
• Black plastic ABS housing.
• Dimensions: L 3.3 x W 2.0 x H 1.6
• Weight .05lbs

Includes:

• SM1-PAP Pre-amplifier
• Installation instructions

Wiring requirements:

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