Sennheiser HD 650 Over Ear Reference Class Audiophile Stereo Headphones Limit 2 is rated 5.0 out of 5 by 3 .

Rated 5 out of 5 by Anonymous from Great Headphones!! These are great; they sound awesome. Worth every penny. An amp is not really needed.

Rated 5 out of 5 by Poorman from Very smooth transaction with no problems as well as very fast shipping! Sound quality is the best I have ever heard from a head phone! Build quality was superb! First thing I realized after just a little while was I need a new headphone amp! lol! The one I have while adequate is not what is really needed to hear all these cans have to offer. I know they were low priced because they are being replace by Sennheiser but who cares they are that good. If your on the fence don't be these are wonderful!