[lukeswits]

I'm trying to diagnose what needs fixing with my pair of HD25s. Sometimes the right ear will drop out which first made me believe that it's the cable or headphone jack, but I noticed that when I ramp up the volume the right ear comes back. So at high volumes the right ear plays fine, but when I start lowering it, it's more likely to drop out. Can someone tell me what part of the headphone might be causing this problem, and is the part replaceable?