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Auto Squelch Panel Mount Stereo Intercoms
ST-440 / 640 Four or Six Place Intercoms
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 Pilot fail safe feature allows pilot to always hear radios.
•
 Push-Button Auto Squelch.
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 Radio priority assures that ATC hears only the crew member transmitting.
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 Installation hardware included, including jack kit & pre-wired harness.
Sigtronics ST-440 Intercom
ST-440 4 Place
The ST-440 / ST-640 models are full stereo versions of the SAS-440 / SAS-640 auto squelch intercoms and include the remote music switcher ( RMS ) unit.

Pilot Isolate
Pilot isolate allows your passengers to listen to music or converse with each other while you talk to ATC without interruption. Even if the intercom is off, our fail safe feature allows the pilot to always hear and transmit on the radio.

Music Inputs
The ST-440 and ST-640 accept input from a CD player, cassette player, AM / FM stereo receiver or Walkman. Music is muted when the VHF / Comm is transmitting or receiving, or when speaking on the intercom. Passengers can also be put on uninterrupted music if they desire.
ST-440 Stereo Four Place
ST-640 Stereo Six Place
Size SAS Unit:
6" x 2.5" x 1"
Size SAS Unit:
6" x 2.5" x 1"
Size RMS Unit:
4" x 2.9" x 2"
Size RMS Unit:
4" x 2.9" x 2"
Weight SAS Unit:
6.4 oz.
Weight SAS Unit:
6.4 oz.
Weight RMS Unit:
7.5 oz.
Weight RMS Unit:
7.5 oz.
Weight Jacks & Harness:
5.5 oz.
Weight Jacks & Harness:
5.5 oz.
Warranty:
5 Years
Warranty:
5 Years
Price:
$418.00
Price:
$461.00
Technical Information in PDF
Installation and
Operating
Instructions
Installation
Operating
SAS
 Panel Template
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