Quote Originally Posted by lingling1337 View Post
Since the HD600 is usually said to be amp-dependent, I'd choose a powerful amplifier like the THS4032CD. I ordered mine on Ebay from Tirna Electronics. Other users with high-impedance 'phones (K701 etc) report good results with the 4032.

EDIT: Of course, you would need to buy the version with the adapter. I assume you've read this whole thread, but if you haven't it's quite worthwhile.
I have read part of this thread. This is a huge thread. So I change both to THS4032CD?