The A20® aviation headset can be configured to either plug into aircraft power (6-pin plug) or rely entirely on battery power (dual plugs).
Connecting the headset to the aircraft
Using the 6-pin plug
A single 6-pin plug inserted into the 6-pin connector provides the headset with aircraft power and intercom audio. If the headset is aircraft-powered, a 6-pin connector must be installed and mounted to an aircraft panel by a qualified avionics installation technician. An adapter is available from Bose to convert a 6-pin connector to a dual G/A plug for additional connection flexibility.
To connect the headset
Align the 6-pin plug to the connector keyway by matching the narrow bar on the plug to the slot on the connector
Firmly press the plug into the connector jack
To disconnect the headset
Pull back on the sleeve near the end of the 6-pin plug
Gently continue pulling back to remove the plug from the connector
Do not pull the connector out without first pulling back the sleeve. Forcing the connector out will damage the cable and/or the aircraft instrument panel.
Using the dual general aviation plugs
The most common battery-only powered version of the headset has two general aviation (G/A) plugs that connect to the aircraft audio. Although the plugs look similar, the microphone plug (top) is shorter and thinner, and has a slightly different shape than the intercom plug (bottom).