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Part# 11-09668
MFR Model# 010-00871-31


Note: Per Garmin we cannot sell the GMA 350H to certified aircraft. For experimental aircraft please fill out the wire harness form below.

With revolutionary hands-free controls, 3-D audio processing, revolutionary auto squelch functionality and much more, Garmin’s GMA 350H digital audio panel was designed from bottom up to reduce a rotorcraft pilot’s workload.

Operate Hands Free
With built-in voice recognition, the GMA 350H helps decrease pilot workload. You can now operate your audio panel without taking your hands off the controls. To do something like switching between COMs, just press a dedicated “push to command” button on the flight controls and say “MIC 1” or “MIC 2.”

Listen in Virtual 3-D
Advanced processing in the GMA 350H adjusts audio in the headset to mimic how the human ear normally hears and registers sounds in space. This 3-D Audio feature makes it seem as though different audio sources are coming from different directions around you. Now it's much easier to focus on and understand one particular source from among many. For example, COM 1 will seem to be coming from the left while COM 2 may seem to be coming from the right.

Distribute Audio Around the Cockpit
The GMA 350H makes in-flight entertainment easy. The system allows you to permanently wire up to two dedicated input sources into the rear connectors, like your XM® satellite music receiver and an auxiliary music device. A 3.5 mm jack on the front also provides easy access for portable audio devices like MP3 players or mobile phones. With the GMA 350H’s “blue-select” mode, the pilot can control which headset positions have access to which audio sources – your passengers can enjoy music while you listen to radio communications or make private full-duplex telephone calls. The system’s intuitive front panel layout features cursor control and volume indicator for easy operation.

Experience Advanced Auto Squelch and Automatic Volume Control
The first of its kind to work in the challenging helicopter noise environment, the auto squelch capability in the GMA 350H adapts to a quiet or noisy cockpit without clipping words or cutting out in the middle of phrases. An internal microphone senses also ambient noise and adjusts the cockpit speaker volume level accordingly. By analyzing the ambient noise level, the system can also adjust audio volumes for the headsets (when configured to do so at the time of installation).

Enjoy Advanced Features
The GMA 350H has green lighting that's compatible with night vision goggles. A handy split COM mode allows the pilot and copilot to select independent frequencies to broadcast on. And should you ever miss an ATC call or frequency assignment, don’t worry -- Garmin’s automatic digital voice recorder is also built in, which continuously captures the last 2.5 minutes of audio for playback.


  • Intuitive front panel layout with cursor control and volume indicator
  • Six/Seven position intercom: pilot, copilot, four or five passengers
  • Three stereo headset amplifiers: pilot, copilot, and passengers
  • Two stereo music source inputs
  • Five selectable intercom operational modes
  • Independent pilot, copilot, and passenger volume controls
  • Individual VOX processing for each mic input
  • Automatic selection of radio audio source when corresponding mic is selected
  • Split COM transceiver function. Copilot may transmit and receive on one COM while pilot transmits and receives on another.
  • Voice recognition
  • Automatic audio adjustment for ambient noise
  • 3-D Audio
  • Marker beacon receiver with lamp driver outputs


  • Physical dimensions 6.25”W x 1.30”H x 7.80”D (15.9 x 3.3 x 19.8 cm)
  • Weight 2.4 lb (1.1 kg)
  • Telephone interface dedicated full-duplex tel interface (no PTT keying required)
  • ICS (intercom system) 6 to 7 position intercom (individual VOX processing for each mic position)
  • ICS isolation modes 5 - All, Pilot, CoPilot, Crew/Pass, None
  • Transceivers 3 - COM1, COM2, COM3
  • Additional receiver inputs 5 - NAV1, NAV2, AUX1, AUX2, AUX3
  • Music source input 1 stereo music source input
  • Music input impedance rear pins: 600 Ohms; front panel jack: 5 kOhms
  • Music frequency response 20Hz - 20kHz
  • Speaker output 28V aircraft — 10W into 4 Ohms, 7W into 8 Ohms; 14V aircraft — 3W into 4 Ohms
  • PA function pilot selectable — requires pressing and holding SPKR button to change state
  • Marker beacon dual sensitivity
  • Manual squelch Yes
  • Automatic squelch Yes
  • SmartMute (includes SmartMute marker audio muting) Yes
  • Intercom volume controls Yes
  • Manual VOX level controls 1 (shared threshold, individual processing)
  • Avionics squelch (squelch processing for noise reduction) Yes
  • Split com (CoPilot transmits and receives on Com2 while Pilot transmits and receives on Com1) Yes
  • Failsafe (connects Pilot PTT, mic and headset to COM1 if unit is turned off) Yes
  • Clearance recorder Yes
  • Alert/Unswitched inputs 5
  • Front panel jack yes (3.5mm - smartphone compatible)
  • Front panel music volume control yes (music and telephone volume controls)
  • TSO Authorization yes
  • Additional includes marker, AUX and speaker volume controls; also features 3D spatial audio and automatic speech recognition.
  • Accessories
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Q: Is the Garmin 350H slide-in tray compatible with the 340?

No, the 340 and 350 trays are different.

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