But now even the KH: The processing is extremely valuable and it wears very comfortable. In my head, it also fits great, it fits perfectly on without pressing. Although I hear mostly at home, I wanted a closed KH because you simply also has the option to be able to enjoy music on the plane or in the train. Ambient noise he shields really good. I had some concerns that the sound in the cramped Vergleuch to come over to open KH, but these concerns, the K551 dispelled immediately before buying. I have not heard a single closed headphones with such a clear and open sound. (KH 500 euros I have deliberately not listening test because that was my absolute Budgrenze). It sounds wonderfully airy and extremely clear.
A "monster bass" is the K551 is certainly not, it sounds real, pure and has (for me) a well-measured and precise bass.
On a headphone amplifier makes it all again a small shovel better. My music ranging from Aretha Franklin on Dire Straits, Led Zeppelin, Genesis, Queen to modern songs from CD or MP3 to 320kbps.