Most US general aviation aircraft use GA dual plugs: a 1/4-inch PJ-055 headphone plug and a smaller PJ-068 microphone plug. Many newer aircraft add LEMO 6-pin jacks that also power ANR headsets. Helicopters commonly use a single U-174 plug, and some airliners use 5-pin XLR. Check every aircraft you fly and buy adapters for the others.
The wrong plug grounds you before engine start. Check the panel before buying.
Connector types
| Connector | Where | Notes |
|---|---|---|
| GA dual plug (PJ-055 + PJ-068) | Most US light aircraft | Two plugs: headphone and mic |
| LEMO 6-pin | Many newer aircraft and panels | Single plug, provides ANR power |
| Redel 6-pin | Some aircraft | Similar role to LEMO |
| U-174/U | Helicopters, military | Single round plug |
| XLR 5-pin | Some airliners | Single plug |
Adapters
Adapters let one headset work across aircraft types. Keep them short and secure, and test before flight. Some ANR headsets with panel-power plugs also have battery modules for aircraft without LEMO jacks.
Choosing
Buy the plug type of the aircraft you fly most. Flight school fleets often use GA dual plugs.
Compare noise reduction in ANR vs passive headsets. Browse headsets.
Common questions
What plug do most general aviation planes use?
GA dual plugs: a PJ-055 headphone plug and a PJ-068 microphone plug.
What is a LEMO plug?
A 6-pin connector that carries audio, mic and power, so ANR headsets run from aircraft power.
Can I use a GA headset in a helicopter?
With a GA-to-U-174 adapter, usually yes. Check impedance and fit with the aircraft's intercom.
Are headset adapters reliable?
Quality adapters work well, but add bulk and connection points. A native plug is better for an aircraft you fly regularly.