Superb headphone, that has excellent detail, amazing soundstage, very nice highs, mids, and a very tight and detailed bass....but to get quality like this, I'm using a blue dragon v3 headphone cable, little dot mk3 tube amp, and playing CDs though them....but even with a modest setup, you will still greatly appreciate the sound that these headphones can put out! Give the hd650's about 100 hours of break-in time, and you will truly hear what they can offer....all in all, STILL one of the best headphones out there....buy a pair, and enjoy! today I started using my hd650 headphones with a full sized CD player, with built I'm dac, and other very high end parts...NOW I'M REALLY IN AUDIO NIRVANA!! DOESN'T GET BETTER THAN THIS!