Our all-time best selling open-back audiophile headphones, the Massdrop x Sennheiser HD 6XX is a replacement to the original HD 650 with a refreshed aesthetic & improved utility.
660s is better technically speaking better sense of separation and imaging than the 650. If you want 650 bass but more controlled, you could always just EQ
660s is better technically speaking better sense of separation and imaging than the 650. If you want 650 bass but more controlled, you could always just EQ