Air New Zealand Air Points - Headphone socket on 773

Hi, I'm flying on Air NZ for the first time in a couple of weeks on NZ6 Auckland to LA and would like to know what kind of adapter (if any) I need for my headphones. Will my headphones with a standard single 3.5mm jack work or do I need a two- or three-prong adapter? I'm in economy.

I did ask Air NZ's call centre this question, but they didn't know the answer. Hope its frequent flyers can help...

Either 2 or 3. You only need 3 if your headphones require an external power source for their noise cancellation, which I very much doubt.

Edit - oops, I just saw you said you're in economy, I have no idea what economy uses (and have no intention of ever finding out :) ), but the above is for business class, which is possibly the same, someone else may know whether they are 2 or 3 prong.

Standard two prong will do it.