@AntlionJoe Where would you recommend I stick these onto on a pair of Senn HD25 1-ii's? (On the cup obviously, but anywhere specific, or?) - Thanks for the reply beforehand.
ModoruHey @Modoru! Well, I have trouble determining the material the ear cups are made out of. If that is rubber, avoid it. Stick it right on that Sennheiser logo and, unless that thing moves around a lot more than I'd expect, you'd be golden. However, if that material is some kind of plastic or in some weird world, metal, I'd stick it pretty much wherever gives you the best feeling, probably bottom and a bit forward, since you can shorten the boom a lot but you can't make it longer than its maximum length :D.
TL;DR - Avoid using the adhesive on rubberized surfaces. It just won't last as long. Otherwise, wherever you want!