Hey, I would suggest that you read the HD598 appreciation thread as it will have amp /DAC questions and other users would post experience and recommendations there. That's how I started the search for my 558. Wish you luck in your search.

I will back up the fact that the E07K works with the 30 pin connector using camera connection kit. You just have to turn USB charge off on the E07K and it will work. I'm currently using that for my youtube watching/netflix streaming/music listening needs using my 3rd gen Ipad and Senheiser HD...

Yeah I was thinking that. Right now I have a mac book pro, not a very good sound card. Unfortunately I dont have a lot of money to spend right now, but that might change in the future. I'm sorta contemplating just going for the E07K now and upgrade to something better like a desktop amp in the...

Yeah I was leaning towards the E07K too, it's cheap and yet effective. I did check out the Aune T1, but how bulky it is plus that light on top and that you have to plug in and be stationary turned me off. Thank you both for your reply and suggestion.

Hi, Not portable in a sense where i'm on the bus or the plane. Portable as in that I travel often, visiting my parents and girlfriend. I would like something I can just take with me. Plus I do use my idevice to listen to music while i'm not sitting at the computer so that would help as well...

Hey guys, I just bought an HD558 for gaming and music about a week ago and so far I'm loving it. I've been reading up on my headphones and this has lead me to the DAC/AMP world. I'm extremely interested in obtaining a portable DAC/AMP to see how much better my music and gaming experience will...