Audio System - Cirrus DESIGN SR20 Information Manual

Cirrus Design Section 7
SR20 Airplane Description

Audio System

The Garmin GMA 340 audio control unit, located in the center console,
provides audio amplification, audio selection, marker beacon control,
and a voice activated intercom system for the cabin speaker,
headsets, and microphones. The system allows audio switching for up
to three transceivers (COM 1, COM 2, and COM 3) and five receivers
(NAV 1, NAV2, ADF, DME, and MKR). In addition, there are two un-
switched audio inputs for telephone ringer and altitude warning.
Additional inputs are provided for two individual personal
entertainment devices. Push buttons select the receiver audio source
provided to the headphones. A fail-safe mode connects the pilot
headphone and microphone to COM 1 if power is removed or if the Mic
Selector switch is turned to the OFF position.
Headset/Microphone Installation
The airplane is equipped with provisions for four noise-canceling
headsets with integrated microphones. The forward microphone
headsets use remote Push-To-Talk (PTT) switches located on the top
of the associated control yoke grip. The rear headsets do not have
COM transmit capabilities and do not require PTT switches. The
microphone (MIC), headset, and automatic noise reduction (ANR)
power jacks for the pilot and front seat passenger are located in the
map case and similar jacks for the aft passengers are located on the
aft portion of the center console. Audio to all four headsets is
controlled by the individual audio selector switches on the audio
control panel and adjusted for volume level by using the selected
receiver volume controls.
Audio Input Jack
Two audio input jacks are provided on the aft portion of the center
console. One jack is located near the convenience outlet for use by the
pilot and forward passenger, and another is located further aft by the
rear passenger ANR power jacks. These jacks can be used to plug in
personal entertainment devices such as portable radios, cassette
players, or CD players. Audio volume through these jacks is controlled
by connected individual entertainment device.
P/N 13999-002 Info Manual 7-75
September 2011