The GARMIN® GMA 342 is an affordably priced yet loaded with features TSO'd panel-mounted audio panel providing direct slide-in replacement for legacy GMA 340 or select third-party units. It can support dual comm, dual nav, 3 aux receivers and 2 wired stereo music inputs — enhanced with bass boost levels, equalizer settings and exclusive 3D Audio technology that spatially separates the multiple communication sources entering the pilot's headset. Up to 2 dedicated stereo music sources can be connected via the unit’s rear connectors. With stereo headsets, incoming audio is spatially separated to reflect how different audio sources come from different directions. An automatic digital voice recorder on GMA 342 continuously captures the last 60 seconds of incoming active comm audio for instant playback with a single button press. Advanced auto squelch technology automatically adapts to a quiet or noisy environment without clipping words or cutting out during conversation.
Accessories: If not included in the ordered unit, installation Kit and other accessories are available at additional cost.
Product 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 (807.4 g), 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 Bluetooth audio)
Impedance: 600 ohm (differential)
Max input: 3.0 Vrms
Gain: +24 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/passenger)
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; 8 Ohm Not Recommended
3dB@1kHz Bandwidth 350 Hz to 6.5 kHz
Distortion: < 10% THD+N at full power, < 3% THD+N at 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