So I just picked up a pair of Equation Audio RP-21 headphones.
They are great. Sound awesome on my stereo, blissful compared to my POS in-ear phones (I'll never use in-ear again)
The problem is, they're very quiet when using on my portable. I'm using a Zune 30gb with WMA lossless. Can I get some suggestions for a portable amp? I listen to all sorts of music, but some examples are Allman Bros, Grateful Dead, Yonder Mountain String Band (Bluegrass), STS9, Bassnectar. A large range, but is there something that will work for me? My price range is below $50, I know I'm a cheapass.
Thanks for the help!