HD 660S2 Smart Control App which are responsible for a

which are responsible for a multitude of distortions

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

Thanks to angled drivers and an open-back design

true-to-life voicing and impactful bass response

HD 660S2 Smart Control App which are responsible for aDive 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