Sennheiser HD 660 S Headphone Review
In the audio community, the Sennheiser HD 650 is something of a legend – an excellent value headphone, it delivers exceptional audio quality without costing the earth. It is perhaps a bold move, then, for Sennheiser to release a successor to the much-loved HD 650, named the HD 660 S.
Crisp and keen treble; much more resolving than HD 650; Smooth and rich mid-range; Controlled; tight bass response; Easier to drive than HD 650; Matte black aesthetic is subjectively better looking than previous designs
Sub-bass extension is still not mind-blowing