Sigtronics – SPA-400 – 4 Place Intercom – Panel Mount Aircraft Intercom

FAA TSO-approved four-place voice-activated (VOX) aircraft intercom designed to provide clear cockpit communication between pilot, co-pilot, and passengers while interfacing with the aircraft communication radio. The SPA-400 features radio-priority circuitry, pilot fail-safe operation, individual microphone biasing for compatibility with different headset types, and a compact panel-mounted design. Installation hardware, jack kit, and pre-wired harness are included for straightforward aircraft installation.

Application: General aviation aircraft cockpit communication systems, pilot/co-pilot/passenger intercom communications, fixed-wing aircraft and experimental aircraft avionics installations

Function: Provides voice-activated communication between up to four headset positions while allowing radio transmission through the aircraft COM radio via push-to-talk switches. Radio-priority circuitry prevents intercom conversations from interfering with ATC communications.