I have an old pair of Sennheiser HD40 headphones, the ones which originally had a thin-ish bright yellow foam insert that sat on the ear when worn. The yellow foam on my ones have at some point in the past been replaced by pretty poorly hand cut foam of the type you might find dividing LPs in old classical vinyl box sets. Luckily the replacement foam hasn't disintegrated yet and I would like to replace it before it does.
What type of foam should I be looking for? The pieces needed are approximately 70mm in diameter and I guess something about 7 or 8mm thick would work best but open to options. I am expecting to have to cut the circles out myself, hopefully a little better than the ones presently fitted, reverting to the original colour of the foam isn't important to me so black/grey/brown woud be fine.
What type of foam should I be looking for? The pieces needed are approximately 70mm in diameter and I guess something about 7 or 8mm thick would work best but open to options. I am expecting to have to cut the circles out myself, hopefully a little better than the ones presently fitted, reverting to the original colour of the foam isn't important to me so black/grey/brown woud be fine.