OK, I have quite a specific request.
I have a set of custom ear plugs (the same shape and size of CIEMs, just solid plastic) and I am looking for some headphones to fit inside them.
What I did before, was use a pair of apple In Ear headphones, take the rubber inserts off, and the actual driver fitted nicely inside. I have no idea what size the drivers were/are on the apple in ears, but I was wondering if there are any better ones I could get that are the same size?