I think the PA2V2 is a poor match as an amp for the HD600.
Given a line-out from an Mp3 player, there is no limit to the amps+cans you can use with them.
Unamped, I think HD595 is the best option for MP3 players.
Originally Posted by Holybanana
Thanks, I'll fix that..
What's the difference between the HD 25-1 and the HD 25?
There are two kinds of HD 25. There's the HD 25-1 and the HD 25-SP (which costs half as much and doesn't sound as good). Usually, when people say just "HD-25", I think they mean the HD 25-1.