Spec Sheet

SM1-HD Hanging 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
High performance, Unidirectional
pre-amplified microphone for high
ceiling and high background noise
applications. Flush mount
Pre-amplifier mounts on ceiling and
microphone hangs 6-25' down. Built in
limiter circuit automatically lowers the
output level during loud sound intervals.
Selectable lo-cut and hi-cut filters
significantly reduce background
noise. Flexible plastic plate
mounts flush or on a single gang
electrical box.
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-HD Microphone
 SM1-PAS Pre-amplifier
 Mounting screws
 Installation instructions.
Options
SPECIFY: Cord length. Default is 6’.
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
SM1-HD Specifications
 Uni-directional 25' pickup pattern with
reduced (-6db) sensitivity on all sides.
 Low noise MOSFET pre-amplifiers.
 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.
 -54db sensitivity, 60db S/N ratio
 Peak Limiter .5sec response time
 100 Ohm unbalanced output.
 3 position Euro-style connector makes
cable termination fast and clean.
 6' cord with RCA end plug.
 Power: 12 to 24VDC @ 10mA.
 On-board voltage regulator and
RFI filtering.
 Industrial temperature range:
-40C to 105C
 Dimensions Plate: L 4.5” W 2.7” H 1.0”
 Dimensions Microphone:
 D .75" L 4.1"
 Weight: 0.1lbs
Made in USA
Sound Surveillance
tm