Data Sheet
SM1-SF Omni-directional
Pre-amplified Microphone
Electronic Technical Services Inc.
211 Conchas SE
Albuquerque, NM 87123
PH 505-888-3923 FAX 505-888-3926
Website: www.etsnm.com
Description
High performance, omni-directional
pre-amplified microphone for use in
semi-covert applications. Small form
factor microphone and pre-amplifier
circuit board. Microphone flush mounts
in a 7/16" diameter hole. Heat shrink
protected, pre-amplifier board can be
mounted with the affixed foam backed
tape or left floating inside a wall or
hidden in a ceiling.
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:
ML1-SF microphone
SM1-N pre-amplifier
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-SF Specifications
Omni-directional 25' pickup pattern
Press mounts into 7/16" diameter hole.
Low noise MOSFET pre-amplifier.
3 foot detachable microphone cord, 3.5mm
male / female connection.
Jumper selectable volume range:
"Line level" (0db) or
"Microphone level" (-30db)
Adjustable gain.
500Hz-13Khz Frequency response.
100 Ohm unbalanced output.
Internal peak limiter circuit (.5 sec response)
3 position Euro-style connector makes
cable termination fast and clean.
Power: 12 to 24VDC @ 10ma
On-board voltage regulator and
RFI filtering.
Includes sticky backed
foam mounting pad.
S/N ratio: more than 60DB
Sensitivity –45DB
Industrial temperature range –40 to 105C.
Dimensions Microphone: D1.2 x L1.2
Dimensions Pre-amplifier Board: L2.35 x W.79
x H.79
Weight .03lbs
Sound Surveillance
tm