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Page 4 of 15 SA-441-17 Installation and Operating Instructions
CP5008A 07/29/08
GENERAL DESCRIPTION
The SA-441 Dual Siren Amplifier with Mechanical Tone is a premium unit designed for dual
100W speaker use. 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 selector switch controls the primary operating modes of Radio, Standby,
Mechanical, Wail, Yelp, and Phaser. A Dual siren control switch provides additional modes,
including dual Mechanical, Wail and Yelp, Yelp and Mechanical, and Phaser and Mechanical.
Two-Tone may optionally replace Phaser. A Siren push-button switch is provided for Manual
control of the output tone or Horn override, depending on the selector switch and option switch
settings. 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 push-button.
An 8-position DIP switch on the amplifier allows selection of various options: Two-Tone to
replace Phaser, Manual Mechanical, Manual Wail, and Horn Ring Cycler 2 (HRC2), which
allows cycling through Mechanical, Wail, Yelp, and Phaser by tapping the horn ring when the
function switch is in the Standby 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.