HD 660S2 Smart Control App The reference-grade 42mm transducer with

The reference-grade 42mm transducer with 38mm diaphragm and ultra-light 150-ohm aluminum voice coil delivers exceptional impulse response and smooth sound for which the entire 600-series is renowned

The new audiophile standard

Audiophiles know that the best components perform at their peak when nothing stands in their way

When combined with its ultralight chassis and luxurious comfort

HD 660S2 Smart Control App The reference-grade 42mm transducer withDive 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