The PMA4000 is a 4-place panel mounted intercom with added capability for switching two communications transceivers and navigation receivers, as well as providing a speaker amplifier. The intercom features PS Engineering’s exclusive IntelliVox® with individual volume controls for both the pilot and copilot.
A multi-position mode switch allows the pilot to select either Pilot Isolate or All intercom modes.
The ISO mode isolates the pilot from the intercom, and connects directly with the aircraft radios. The copilot and passengers are free to have conversation and enjoy the entertainment without radio interruption. The pilot is not distracted by passenger intercom use and has control over the radio communications.
The “ALL” mode places everybody on a party line. Each person hears all intercom conversation and aircraft radio reception. Everyone hears the entertainment source as well.
The “Off” mode is part of the automatic fail-safe interconnect to the aircraft systems. If power to the intercom is disrupted, the pilot’s headset is automatically connected to the aircraft radio. This permits continuous radio communications.

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