The AKG K 551 is, for me, a fantastic OverEar headphones. ** Supplement: Absolutely upload! Got myself the headphones in black as a bargain and compared him with my one year old white K551. The highs are very flashy, metal is almost inaudible, the bass is not as good, the stage is smaller. I have the old two days (nights) recorded, but did not think that that makes such a difference in a dream. ** Condition were: 1. Enclosed assembly 2. "On the Road", ie short cable, remote control (best for iPhone) 3. Volume Up / low impedance, important in OverEar headphones especially for older, "quiet" music. 4.Stylisch, where I went before more than 20 years AKG's K270 (OverEar) and cassette player or discman in the subway, "few" years before it was Cool :-) advantage back then, there was no volume limitation on the equipment, so I just took out enough volume from the AKG's K270. Atoenne has already written excellently on Sealing, construction, Loudness War and volume, in addition to the microphone on the remote control is very good. I think that Sealing very good, even at night in bed I wake my wife, at normal volume level, do not. I also wanted not actively shielded headphones, so I hear neither wife nor children, when something happens. In the metro annoying nix because I like to listen to loud, because you ignored even loud quarreling couples. The volume has neatly reserves. Someone has the volume of InEars compared with that of OverEars ... InEars have much smaller drivers and are much louder with the same output power. Now I go with some contrary. The bass is awesome, indescribably simply WOW. With Erykah Badu "rimshot" Nalin & Kane "Beachball", "Wait" from the Furl Yang Twins, madness, the hammer is "Trance and Acid by Kai Tracid. The bass is totally accurate, very precise "textured", sometimes weak and dry, sometimes totally strong and warm. With many songs I noticed how different the bass. Also double bass is like metal or some techno songs, no problem. The clear highs that I do not miss, can at high volume / clinking be exhausting, but tempted not to listen too loud. Disco volume always goes :-) Surprisingly (for me) of the AKG K551 is fully suitable for modern, electronic music à la David Guetta, DJ Antoine, Alex Clare and Berlin Calling by Kalkbrenner. Homogenic by Björk has never looked so good belongs. "Fat" sound, such as "All I need" of Air, Massive Attack, Tricky or Schiller, in which people like to close your eyes, is gorgeous. Rock, metal and live recordings sound incredible "Real". I have in a long time had goosebumps when listening to music, for example in Money for Nothing by Dire Straits, Madonna Shanti, at Queen, Metallica, System of a Down, with The Doors and Santana and and ... puhh priceless :-) The workmanship is very good, neither cold nor rain have left traces. I have the AKGs yes only two months, but am now hooked. ** Well, for over a year, in use every day. ** The build quality is really top. The end of the cable plug is in a spout which is torn, but this is my fault, I'm often stuck. Others were torn headphone cable. I tell yet how long my new K551 needs to sound to optimal'm just very glad that I then recorded my old white man. There is now the K545, but it is much quieter bzw.schlechter of the specifications here, hopefully I can time trial hearing.