The SPA-4S is a compact 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.
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.
Yes, both wire harness and jacks are in the box.
Yes, this unit is TSO'd.
Yes, 4 jacks are included.
Yes, both units are TSO approved.
The SPA-4S is for stereo headsets, Please view the SPA-400 p/n: 11-02791 for the standard version.
Yes, part # 11-00567 is FAA TSO approved.
As long as the wiring is done correctly, it will work.
Per the manufacturer, 22 gauge wire is used for the harness.