Sound quality: - with FLAC music:  bass is lot  medium is average  high is medium-high Tested with rock music, drum and bass and beatbox. Recommended for music with lot of bass. Clear, not noise heared.   - with MP3 music:  bass is more  medium is high  high is lower Tested with 320kbs mp3s and sound is clear but sometimes hear low noise effect.   Volume level is very good high. I like this headphone. You need just try one, and you like them too :)