HD 660S2 Wireless headphone unique to the IE900

unique to the IE900

and Sound Personalization create a customized listening experience

Inspired by Music

the HD 600 is engineered for absolute clarity and delivers the most natural personal listening experience

The foundation of the extraordinarily clear sound of the HD 600 is its’ open acoustic design and the revolutionary transducer

HD 660S2 Wireless headphone unique to the IE900Dive deeper into legendary sound. Nothing makes music feel dramatic like powerful bass. The extremely precise yet non fatiguing sound of the HD 660S2 now delivers even more impact with extended sub bass. Our engineers optimized the HD 660S's surround, transducer airflow, and coil to double the sound pressure at the lowest octaves. You can feel the lowest note on the piano (27. 5 Hz) or the bass drum kick (45 60 Hz) as if you were there. The relaxed