ETS KMSP-1 User Manual

KMSP-1 Keyed Microphone Mute Switch

The KMSP-1 is a flush mount, stainless steel, keyed mute switch with an LED status indicator for
use with ETS SM1 series microphones. The KMSP-1 is typically used in interview or interrogation
rooms when it is required that the microphone be turned off on occasion.

Cable Run

Run a 22 gauge, stranded, two conductor shielded cable between the KMSP-1 and the
microphone and the KMSP-1 and the monitoring equipment. The KMSP-1 can be located
anywhere along the cable run between then microphone and interface equipment. Keep total
cable run length at 1000 feet or less and away from power sources, light fixtures and electrical
equipment. Connect (red) power to the + terminal, the audio signal (black) to the “audio” terminal
and ground (shield) to the – terminal.

Mounting

The KMSP-1 can be surface or flush mounted on walls, cabinets or furniture. For flush mounting,
cut a 2 ¼” by 2 ¾

“ hole in the mounting surface to allow room for the circuit board and mount the
KMSP-1 to the surface with screws. A single gang electrical box can also be used for surface
mounting.

Mute Switch and LED indicator

When the key switch is placed in the horizontal position (LED located at the top), the LED is
Green and the microphone output is not muted (on). When the key switch is placed in the vertical
position, the LED lights Red and the output is muted (off).

Caution

It may be against the law to install this microphone kit in certain environments. It may also be against the law
to record conversations of the person(s) being monitored without their knowledge. It is the responsibility of
the installation company and end-user to determine if the application of this product is le gal. These laws vary
from state to state. If you are not informed on these matters, consult a qualified attorney or contact the
appropriate state agency. A sticker is provided with this kit for the applications where notification must be
posted.

Warranty

All ETS products carry a one year parts and labor warranty. This warranty does not cover damages as a
result of misuse, improper handling of the unit or exposure to extreme temperatures or moisture. At its
discretion, ETS reserves the right to repair or replace this unit under the conditions of the warranty. If you
experience problems with your equipment call ETS at: 505-888-3923 to obtain a return authorization
number. Equipment requiring repair beyond the warranty period or units that have been damaged or are not
covered under the warranty can be repaired by ETS for a minimal cost under most conditions.

Made in the USA

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