FiiO E5 user here. I've been using this small headphone amp for my pc for 4 years and it's still going strong.

My headphones gave up before my E5. (sennheiser HD201, due to the terrible insulation that comes with it. It decomposes after 1 or 2 years. I don't have cables to do any recabling yet. Not going to buy sennheiser again, really.)