I'm not sure if this belongs on the Delta forum or the Travel Technology forum, but I think it belongs here...

I have a set of Bose QC15 headsets, and I use them on airline flights all the time, even when the airline offers noise cancelling in first or business, because I just like mine. When I got the QC15s a couple of years ago, I know that it came with a bunch of adaptors, but of course now I can't find them. On my last 777 biz. class flight on DL (these have the two-prong plugs for headsets, and the QC15s only have one prong), I ended up plugging the one prong into one hole halfway for audio; if I pushed it in the entire way it wouldn't work, but the problem was that it fell out a lot. I did a search and found this, and it linked to a two-prong adaptor, but I'm pretty sure that the DL 777s have double prongs where one is large and one is small. Does that ring a bell with anyone? If it's the two-prong, same size, like here, I'm fine because I have a a couple of backups already. However I can't seem to find the two-prong adaptor with one big prong and one small prong.

So...Question One: Does DL have the two-prong same-sized (3.5mm) holes, or the two-prong different-sized prong holes?

And then...Question Two: If they're the two-prong, different-sized holes, does anyone know where I can buy a two-prong one large / one small-pronged adaptor for my headsets so they'll work with my upcoming DL flight?

If I'm mistaken, and the DL 777s are two-pronged 3.5mm ones, then, um, never mind...