Suggest you check out the forums at Headwize.com and head-fi.org for more info. Also highly recommend that you buy nothing w/o a rite of return. I have tried 3 different headphone amps-Audio Alchemy, X-cans and Earmax. Only the Earmax was better than what I usually listen thru (Headphone output of NAD receiver) and it wasn't better enough to justify its cost. After trying those 3, I lost interest in them, decided to upgrade my front end and headphones instead-better ROI.
