Affordable Audio Control for Your Certified Avionics
For pilots who want the best of the basics in audio control, combined with rich “home theater” quality sound, the GMA 342 all-digital audio panel is a perfect fit. It’s affordably priced yet loaded with features previously found only on high-end audio management systems. Plus, for easy system upgrade, it offers direct slide-in replacement for legacy GMA 340 or select third-party audio control panels. So it doesn’t take long for your installer to pull out the old and slide in the new. Easy Connections, Better Communications
Enjoy a Little Traveling Music
Listen in Virtual 3-D
Get Instant Replay on ATC Calls and Clearances
High-performance Auto Squelch
Easy Installation/Upgrade
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Specifications
Physical & Performance
- Electrical:14-28 VDC
- Unit size: 6.3″W x 1.33″H x 8.09″D (160 x 34 x 205 mm), includes mounting rack and connectors
- Weight: 1.78 lbs. (807.4g), includes rack, backplate and connectors
Environmental
- Temperature: -20° C to +55° C (operating)
- Altitude range: to +55,000 ft. MSL unpressurized
- Power requirements: 11 to 33 VDC input
Radio Inputs
- Impedance: 600 ohm
- Max Input: 5 Vrms
- Isolation: 60 dB minimum
- Bandwidth: 100 Hz to 6.5 kHz
- Transceiver: 3 (including TEL)
- Receiver: 5 (NAV1, NAV2, AUX1, AUX2, AUX3)
- Alerts: 4 (unswitched)
- Telephone input: 1
Intercom Functions
- Positions: 6 (pilot, copilot, 4 passengers)
- Volume control: 2 (pilot, copilot/passengers)
- VOX: Automatic (1 per MIC input)
- Modes: Pilot, crew, all
- MIC impedance: 150 ohm
- MIC bias: 11 VDC through 470 ohm
- Keyed ICS: Configurable
Music Functions
- Inputs: 2 (independent from front 3.5 mm jack)
- Impedance: Connector pins 600 ohm (differential); front jack 5kOhm
- Max input: Rear connector 3.0 Vrms; front jack 1.5 Vrms
- Gain: Rear connector +24 dB Max; front jack +21 dB Max/-96dB Min
- Input level: < 200 mVrms at max gain for full power out
- Bandwidth: 20 Hz to 20 kHz
- Distortion: < 0.1% THD+N typical at full power over full bandwidth
- Muting: Selectable and configurable
- Volume control: Knob controlled (Pilot and Copilot/Pass)
Headphone Outputs
- Output amplifiers 3 Stereo (pilot, copilot, passenger)
- Output power: 65 mW into 150 Ohms pilot and copilot, 260 mW into 37.5 Ohms passenger
- Distortion: < 3% THD+N at 10% power, < 10% THD+N at full power
- Frequency response: 20 Hz to 20 kHz
- Impedance rated: 150 Ohm pilot/copilot, 37.5 Ohm passenger (4-150 Ohm headsets)
- Impedance supported: 150 to > 600 Ohm
COM/TEL Microphone Outputs
- Output power: 15 mW into 150 Ohms (1.5 Vrms)
- Distortion: < 3% THD+N at 10% Power, < 10% THD+N at full power
- Frequency response: 300 Hz to 6 kHz
Front Jack Microphone Output
- Output power: 170 uW into 450 Ohms (276 mVrms) connected as phone
- Frequency response: 300 Hz to 6 kHz
Speaker
- Outputs: 1
- 28 Volt Aircraft: 10 Watt into 4 Ohm; 7 Watt into 8 Ohm
- 14 Volt Aircraft: 3 Watt into 4 Ohm; 3dB@1kHz Bandwidth 350 Hz to 6.5 kHz
- 3dB@1kHz Bandwidth 350 Hz to 6.5 kHz
- Distortion: < 10% THD+N @ Full Power, < 3% THD+N @ 10% Power
Voice Recorder
- Record time max: 1 minute
Code Load Options
- SD Card
DIP Switch
- Config switches: 8 (see install manual for descriptions)
Lighting Bus
- Voltage: 14 V or 28 V
In The Box
- GMA 342 audio panel
- Installation kit
- Pilot’s guide
- 3.5mm audio cable – 6 Feet (1.8 Meters)

