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Garmin GMA340 Audio Panel

Garmin GMA340 Audio Panel


Part Number: 010-00152-11



Premier Avionics is an Garmin GTN650 and G600 Demo Dealer

  • Overview
  • Specifications
  • In the Box
  • Accessories
  • Versions
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The GMA 340 audio panel offers the latest in digital features to reduce cockpit workload and improve communication.

Operate with Ease

GMA 340 features convenient, LED-illuminated button controls for audio selection of both nav and com audio — as well as split comm capability for pilot and co-pilot. Large buttons activate the comm microphone and audios for up to three comm transceivers to simplify cockpit workload. Split comm allows the pilot to transmit/receive on Comm 1 and the co-pilot to transmit/receive on Comm 2.

Enjoy Host of Features

GMA 340 streamlines cockpit management. It provides MASQ processing, which reduces ambient noise from the avionics inputs, and it has special circuitry to de-emphasize cabin noise to enhance communication in the cockpit. You can select speakers to monitor the aircraft radios or make PA announcements. The 340 also provides comm transmit indication and the three-light Marker Beacon receiver/indicator with high or low sensitivity and SmartMute audio muting.

GMA 340 has two unswitched inputs for telephone ringers, altitude alert warnings or other warning tones, so you'll never miss an important incoming transmission. The 340 also includes a six-place VOX intercom with three modes of isolation, dual stereo music inputs and independent pilot, co-pilot and passenger volume control. In fact, each microphone input has a dedicated VOX circuit to ensure that only the active microphone is heard when squelch is broken.

GMA 340 is easy to install in the tightest aircraft spaces. Operation is available in 14 or 28 volts without voltage converters or dropping resistors. Installation is simplified with the built-in intercom and marker beacon, and the GMA 340 also features photo cell dimming of annunciators, pilot fail-safe mode connection to Comm 1 and FAA TSO approval.

GMA 340: Technology that has everyone talking.

Physical and Performance:
Unit dimensions, WxHxD: 6.29"W x 1.3"H x 7.72"D (16 x 3.3 x 19.6 cm)
Weight: 1.7 lb (.8 kg)
Telephone interface: tel ringer input, COM3 may be used as keyed (PTT) telephone interface
ICS (intercom system): 6 position intercom (individual VOX circuits for each of the 6 mic positions)
ICS isolation modes: 3 - All, Pilot, Crew
Transceivers: 3 - COM1, COM2, COM3
Additional receiver inputs: 4 - NAV1, NAV2, ADF, DME
Music source input: 2 stereo music source inputs - isolation modes differ from 347
Music input impedance: 460 Ohms
Music frequency response: 100Hz - 15kHz
Speaker output: speaker output for radios or PA function (10W into 4 Ohms or 8 Ohms)
PA function: pilot selectable - dedicated button
Marker beacon: dual sensitivity
Manual squelch: yes
Automatic squelch: no
SmartMute (includes SmartMute marker audio muting): yes
Intercom volume controls: yes
Manual VOX level controls: 2 (pilot, co-pilot/passenger)
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: no
Alert/Unswitched inputs: 2
Front panel jack : no
Front panel music volume control: no
TSO Authorization: yes

What's in the Box:

  • GMA 340 audio panel
  • Installation kit
  • Pilot's guide

Package contents may vary per version. See Premier Avionics for more information.

Garmin GTN Series PC Trainer
Garmin GMA Pilot's Guide

Part Number
GMA 340 System with installation kit and pilot's guide
GMA 340 System dual ADF with installation kit and pilot's guide
GMA 340 System helicopter with installation kit and pilot's guide

The Garmin GMA340 Audio Panel

Garmin GMA340 Audio Panel