No worries, if you get the twin plug version you can always get a PJ to XLR adapter for about 30 USD (that won't of course power the headset, but you can't be sure the aircraft connector is powered anyway). If you really don't want to use your batteries (or rechargeables) then you can get the XLR cable assembly from Bose for 250 USD or so, but I don't think that's worth it. Other than that I've been using my A20 for the past seven years on anything from a Piper Tomahawk to a B777, I had two cable breakages in that time and those have been repaired for free by Bose, so I'm a happy customer
