Page 4 SA-441 Installation and Operating Instructions
CP4816A 11/6/01
GENERAL DESCRIPTION
The SA-441 Dual Siren Amplifier is a premium unit designed for dual 100W speaker use from
a 12 volt DC power source (negative ground). The control head is only 1 inch deep and can
be installed in minimum clearance areas. Connection between the control head and amplifier
is via a single lead wire with common ground.
A 6-position rotary switch controls the primary operating modes of Phaser, Yelp, Wail,
Manual, Horn and Radio. A Dual siren control switch provides additional modes, including
dual Wail, dual Yelp, Wail and Yelp, dual Phaser, dual Horn, and Two-Tone. A Siren control
button is provided for control of the output tone when in the Manual mode, and control of Horn
and Yelp Overrides, depending on the function switch setting. An independent toggle switch
controls power. A hole is provided in the amplifier to adjust Radio volume.
Depending upon the version, the microphone may or may not be directly mounted to the
control head. Units with an “F” suffix have the microphone permanently mounted to the
faceplate. Units with an “FX” suffix are provided with an extension harness and connectors for
remote mounting of the microphone.
An auxiliary input is provided for connection to a positive or negative horn ring circuit or
switch, performing the same function as the Siren button.
An 8-position DIP switch on the amplifier allows selection of various options: Two-Tone to
replace Phaser, Phaser disable, Horn disable, dual mode disables and Horn Ring Cycler
(HRC), which allows cycling through Wail, Yelp, Phaser and Standby by tapping the horn ring
when the function switch is in the Horn position. The front panel is backlighted with LED's for
night visibility.
This durable unit utilizes short circuit, high voltage, and reverse polarity protection systems for
maximum service life over a wide temperature range. Two separately fused amplifiers provide
redundancy, and the unit will operate with only one amplifier functioning.