Home > Avionics > Intercoms > Sigtronics Intercoms >

Sigtronics SPA-4S 2 or 4 Place Stereo Intercoms
Sigtronics SPA-4S 2 or 4 Place Stereo Intercoms
Sigtronics SPA-4S 2 or 4 Place Stereo Intercoms


SPA-4S Two or Four Place Stereo Intercoms

  • FAA TSO approved.
  • Pilot fail safe feature allows pilot to always hear radios.
  • Use Satellite Radio, MP3 or CD players as audio source.
  • Reversible face plate included for vertical or horizontal mounting.
  • Radio priority assures that ATC hears only the crew member transmitting.
  • Installation hardware included, including jack kit and pre-wired harness.
  • WARRANTY: Five years parts and labor.

Compact Stereo System

The SPA-4S is a 2 or 4 place voice activated intercom with inputs for stereo music. It is a compact system that allows it to fit in space critical panels. The SPA-4S uses the industry standard Sigtronics squelch, fast on slow off for hands free communication. The music will full mute during ATC communication and partial mute during intercom communication. When radio / intercom use is ended the music will gradually return to its previous volume.

Easy Upgrade

Each intercom comes complete with all necessary mounting hardware, jacks, and two 4-foot pre-wired harnesses. The SPA-4S only requires 1" X 2.5" of panel space, mounts horizontal or vertically, is 4" deep, and weights 5.5 oz. The SPA-4S intercom can easily upgrade the SPA-400. The SPA-4S uses the same panel hole pattern and interface cable as the SPA-400. A second cable is provided for the music inputs and headphone outputs.

High Noise Environment N Series

The FAA TSO approved SPA-4SN is available for the high noise amateur built aircraft and helicopters. As with all of Sigtronics' products, the SPA-4S / SPA-4SN are RFI and EMI immune. The SPA-4S intercom is constructed of high quality components and carries a five-year parts and labor warranty. The SPA-4S will operate on an input power of 11 VDC through 32 VDC. Maximum current drain 0.10 Amps.



SPA-4S 4 Place Stereo [$330.00]
SPA-4SN High Noise Environment Version [$355.00]

SPA Faceplate - Adapts SPA Intercoms to 2.25" round instrument hole (PN 900068) [$11.80]

Features Technical Specs

Share your knowledge of this product. Be the first to write a review »