Sennheiser unveils HD 660 S headphones

The HD 660 S don’t look a million miles away from the HD 650s - despite wearing a new matt-black finish, they still feature their predecessor’s elliptical ear cups, thickly cushioned headband and replaceable ear pads. But Sennheiser has worked on the innards in the attempt to take performance to the next level.

According to Sennheiser, the new transducer offers improved control of diaphragm movements, with the improved acoustic design aiming to minimise distortion.

With 150-ohm impedance, the HD 660 S are also determined to be just as easily used with smartphones and portable music players as with hi-fi components (although we aren’t sure the open-back design lends itself to the former in any case).

Whether they’ll take the fight to the Shure SRH1540s (£430) – Award-winners at this sort of price – is yet to be established. But a mid-October release date means we should be able to find out very soon.


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Becky Roberts

Becky is the managing editor of What Hi-Fi? and, since her recent move to Melbourne, also the editor of Australian Hi-Fi magazine. During her 10+ years in the hi-fi industry, she has reviewed all manner of audio gear, from budget amplifiers to high-end speakers, and particularly specialises in headphones and head-fi devices. In her spare time, Becky can often be found running, watching Liverpool FC and horror movies, and hunting for gluten-free cake.