Sennheiser HD 660S2 Wired Over-Ear Audiophile Headphones ZA BF Stands part of the new LE

part of the new LE Audio standard that the RS 120-W is built on

Frequency response (speaker) 10 to 28

With the EQ option

Designed for high sound pressure levels

Sennheiser HD 660S2 Wired Over-Ear Audiophile Headphones ZA BF Stands part of the new LESennheiser HD 660S2 Wired Over Ear Audiophile Headphones 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. The extremely precise yet non fatiguing sound of the HD 660S2 delivers even more impact with extended sub bass. With an optimized surround, transducer airfl ow, and coil our engineers doubled the