(X-posted from headphone amps) I really like my new Lepai Tripath Class-T amp (http://amzn.to/W9fPmF) but it produces a high pitched whine that really ruins it. When I touch the outside box it somewhat decreases. This makes me think it needs to be grounded. It takes a 12V adapter. Is there...

First off let me apologize in advance if this is the incorrect subforum. I know this isn't a headphone amp per se, but it's similar. I really like my new Lepai Tripath Class-T amp (http://amzn.to/W9fPmF) but it produces a high pitched whine that really ruins it. When I touch the outside box it...

Exactly what the title says. I just want good headphones to listen to from my iPod through a Fiio E6 amp. In-ears preferred because they have to be portable. I listen to everything from choral arrangements to post-hardcore to smooth jazz, except country and rap of course. What should I get?  ...