High performance, Unidirectional pre-amplified microphone for use where side noise must be reduced. Covert housing designed to appear exactly like a modern smoke detector. Simply mount the SM1-SDU in the direction of interest. Built in limiter circuit automatically lowers the output level during loud sound intervals. Selectable lo-cut and hi-cut filters significantly reduce background noise. Ivory ABS enclosure Mounts on any flat surface. 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:

• Unidirectional 25' pickup pattern with reduced (-6db) sensitivity on all sides.
• Low noise MOSFET pre-amplifiers.
• 500Hz-16Khz Frequency response.
• Switch selectable hi-cut/lo-cut filters limit frequency response to up to 900 to 6Khz significantly reducing background noise.
• Switch selectable volume range: "Line level" (0db) or "Microphone level" (-30db)
• Adjustable gain in both volume ranges.
• Peak Limiter: .5sec response time
• 100 Ohm unbalanced output.
• 3 position terminal block
• Power: 12 to 24VDC @ 10mA.
• PTCC fused and reverse polarity proteced
• On-board voltage regulator and RFI filtering.
• Temperature range: -40C to 85C
• Ivory ABS enclosure Mounts on any flat surface.
• Dimensions: Dia. 4.00 x H1.80
• Weight: 0.09lbs

Includes:

• SM1-SDU Microphone
• Warning label.
• Installation instructions.

Options:

• See Pre-amplifier board selection guide for alternate pre-amplifier form factors.

Wiring requirements:

• 2 conductor shielded (with drain wire) 22 gauge stranded. Max cable length 1500’