I am trying to troubleshoot ground loop issues with my Asgard 3 and am wondering what else is out there in case I can't figure this out. I'd be looking for either a combo headphone amp/DAC or a stack that can handle the following: * USB Input from my Macbook * RCA input from my turntable's...

All -   I am a frequent traveler in search of an upgrade from my audio technica ath-anc7 travel headphones. I like these a fair bit but being on-ear they tend to hurt my ears after a couple of hours and the sound quality is not as great as I'd like. I bought a pair of Ety HF3s, but the...