For anyone else that comes across this issue (this is one of the first results for the symptoms) with a Gen 1 WA7 this is caused by a common failure of the C-Media CM6631A USB controller. A few other devices using this controller have the same issue (Schiit Modi 2 and Emotiva DC-1 for example)...

Hello everyone,   I'm considering getting the UE9000's, I was wondering if anyone could compare the sound quality of these to Sennheiser HD485's I currently have? I would like some wireless headphones and get absurdly cheap staff deals on Logitech gear through my work so they seem like a...