I'm using a fairly basic source powered through usb -- could dc output still be an issue here? I made a mistake, I meant to say I'm using the darkvoice 336. Regarding the dB reading: I was trying to be more explicit that I don't listen to too terribly loud of volumes, as that's a...

I have myself a pair of these headphones, and they've recently been giving me a lot of pain. I power mine through the 332, and after upgrading the power tube I started having ear pain and headaches. I swapped the tubes back, but the problems persist.   The symptoms onset quickly; within ten...