Sennheiser HD 660S2 Audiophile Headphones noise-isolating 4mm output is compatibility and

4mm output is compatibility and convenience

Tuned to unleash the potential of your Multi-brid IEMs

and skip tracks forward and backwards and even activate the voice assistant on your Bluetooth-connected smart device

Ambient Aware mode for situational awareness while on the go

Sennheiser HD 660S2 Audiophile Headphones noise-isolating 4mm output is compatibility andDive deeper into your music. Enjoy your music on a completely new level. An intimate, relaxed sound signature combines with outstanding precision and exceptional comfort and now, extended sub bass for a deeply moving experience. Extended sub bass Natural, warm sound Comfortable open back design Your new desert island headphone Every high end headphone has its own unique personality. What if you could only own one? Ever felt goosebumps from sound so