Data Sheet

SM4
4 Channel listen only
mixer / switcher
Electronic Technical Services Inc.
211 Conchas SE
Albuquerque, NM 87123
PH 505-888-3923 FAX [phone]
Website: www.etsnm.com
Description
Stand alone 4 channel base station
for monitoring 4 SM1 series
microphones. Terminals for
connecting and powering up to 8
Sound Surveillance SM1 series
microphones. Two modes of
operation: Select one of 4 mode or
mix in / out any combination mode.
Connects to DVRs or tape
recorders for live monitoring or
playback Headphone jack for
private listening.
Includes
 SM4 mixer / switcher base station
 2 RCA patch cords
 12VDC AC adapter.
 Installation instructions
Microphone wiring Requirements
 Stranded 22-gauge, 2-conductor
shielded cable with drain wire.
Max. cable length: 1500’.
Caution
It is the responsibility of the installation company and end
user to comply with state and federal privacy laws regard-
ing the use of audio surveillance equipment. If you are
unfamiliar with these laws, consult a qualified attorney. In
most cases, posting the provided warning label in plain
view is all that is required.
SM4 Specifications
 2 Watt speaker power amplifier
 3" full range speaker
 3.5mm headphone jack
 Line level input and output jacks for
connection to DVRs and tape recorders.
 Recorder monitor switch.
 Level controls for each microphone.
 In / out switch for each microphone.
 Two modes of operation: Select one of 8
mode or mix in / out any combination
mode.
 Master volume control
 Power: 12Vdc @ 250ma
 Reverse polarity protected
and fused.
 High quality metal enclosure
 Dimensions: L5.50 x W5.50 x H 1.25
Warranty
1 year parts and labor. Made in U.S.A.
Sound Surveillance
tm