190-01134-11 GMA 350/350c/350H/350Hc Installation Manual
Rev. J Page 1-2
1.2 Equipment Description
The Garmin GMA 350/350H is a horizontally oriented panel-mounted audio controller and marker beacon
system that collects, processes, and distributes audio signals between avionics, crew, and passengers.
The GMA 350/350H is a high-fidelity digital audio product with improved circuitry that make audio
signals less prone to noise (e.g. whining sound of an alternator or blip sound from a radar). At the GMA’s
core is a digital signal processor (DSP) that cleans up audio using advanced filtering techniques and
provides VOX control for mic inputs. On the outputs, the GMA 350/350H features high-quality
digital-to-analog converters and headset amplifier circuits that are used to minimize noise and distortion.
The GMA 350/350H provides a speaker output that may be used as a cockpit speaker or for a PA system to
address passengers. The GMA 350/350H also includes a digital recording and playback feature. The
GMA 350/350H allows ICS volume adjustments for pilot, copilot, and passenger. Additionally there is a
volume adjustment for the MKR, AUX, MUSIC, and TEL sources.
The GMA 350c, GMA 350Hc, and GMA 350Hc Traffic includes Bluetooth
®
technology, used to
wirelessly connect smartphones and tablets to stream audio and make phone calls. The GMA 350c, GMA
350Hc, and GMA 350Hc Traffic also wirelessly connect to a VIRB XE, eliminating the need to install a
headset audio cable.
The GMA 350H Traffic and GMA 350Hc Traffic units include a button for enabling and disabling of TIS
(Traffic Information Service) audio. Electrical and mechanical specifications are identical to the
GMA 350/350H.
For operating instructions refer to the GMA 350 Pilot’s Guide (190-01134-12) or the GMA 350H Pilot’s
Guide (190-01134-14).
Figure 1-1. GMA 350
Figure 1-2. GMA 350H
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