Buttman,

You mean panel powered
headsets are permanently wired into the airplane?


No, but most use a different tpye of plug for panel power. E.g. for the
Bose, you can switch the cable assembly, but it takes a screw driver -
and 250 bucks or so for the "other" cable. LS also uses a different
plug.

--
Thomas Borchert (EDDH)