Head-fi has turned me into a crazed headphone/music lover and as much as I love it I have spent much more than I should have... I know I know, warnings were there (forum slogan :P). Anyways, I think I have to let go of my hd800's (new version 25***). Any suggestions for a good mid-fi headphone...

Hey,   Just purchassed a Schiit Lyr from the trading forum. So this unit is used but still in great condition. I am hearing a hum/buzz coming out of the amp, not the speakers or headphones that are connected to it (it happens when everything is disconnected). It is unnafected by the volume pot...