Data Sheet

SM1-W Omni-directional
Pre-amplified Microphone
Electronic Technical Services Inc.
211 Conchas SE
Albuquerque, NM 87123
PH 505-888-3923 FAX [phone]
Website: www.etsnm.com
Description
Weather resistant, high performance,
omni-directional pre-amplified
microphone. For use in outdoor
applications and can withstand
exposure to various weather
conditions. Built in limiter circuit
automatically lowers the output level
during loud sound intervals.
Selectable lo-cut and hi-cut filters
significantly reduce background noise.
Includes a removable .5 inch wind
screen inserted into a directing tube.
Cast Aluminum plate mounts on any
flat surface or on a single gang “bell
box”, gasket included.
Connects directly to our switcher /
mixer / amplifiers or use one of our
many interface products to make
fast and clean connections to DVRs
or remote monitoring equipment.
Includes:
 SM1-W microphone.
 Gasket
 Warning label.
 Installation instructions.
Wiring requirements:
2 conductor shielded (with drain wire) 22
gauge stranded. Max cable length 1500’.
Caution
It is the responsibility of the installation
company and end user to install this audio
surveillance equipment in compliance with
state and federal privacy laws. If you are
unfamiliar with these laws, consult a qualified
attorney.
Warranty
1 year parts and labor. Made in USA
SM1-W Specifications
 Omni-directional 25' pickup pattern
 Low noise MOSFET pre-amplifier.
 500Hz-13Khz Frequency response.
 Jumper selectable hi-cut/lo-cut filters limit
frequency response to up to 900 to 6Khz
significantly reducing background noise.
 Jumper selectable volume range: "Line level" (0db)
or "Microphone level" (-30db)
 Adjustable gain in both volume ranges.
 Internal peak limiter circuit (.5 sec response)
 100 Ohm, unbalanced output.
 Directing tube with removable .5 inch
windscreen.
 3 position Euro-style connector makes
cable termination fast and clean.
 Power: 12 to 24VDC @ 10mA.
 On-board voltage regulator and RFI filtering.
 Industrial temperature range: -40C to 105C
 S/N ratio: more than 60DB
 Sensitivity –45DB
 Conformal coated circuit board.
 Cast Aluminum plate mounts on any flat
surface or on a single gang “bell box”,
gasket included.
 Dimensions: L 4.6” W 2.8” H 2.3”
 Weight 0.12lbs
Sound Surveillance
tm