This headphone is used on my MP3 player provides excellent sound quality, with a very homogeneous spectrum, low present but without excess. Conte comfort and it is very light after some time of use does not hurt the ears. It is a closed helmet, it does not totally isolates (nothing to do with a Sennheiser HD 25!) But still remains correct. The case for the store is a little small. Little doubt as also on cable, too late .... But overall very positive feeling anyway!