Sennheiser HD 660s Audiophile Headphones - Discontinued xlr-3 female 0 standard and benefit from

0 standard and benefit from iFi’s Active Noise Cancelling technology to remove distortion from the audio signal

Advanced technology provides steady and pristine power to the vacuum tubes and the DAC

5 AWG 6N OCC Ground Pin Copper plated with 24K gold Copper plated with 24K gold (thicker) 4

full dynamics

Sennheiser HD 660s Audiophile Headphones - Discontinued xlr-3 female 0 standard and benefit fromHD 660S The perfect blend of power and control. The powerhouse open back headphone Connects you to the deepest corners of your music collection. Hi fidelity sound Open back design 42mm transducers Luxurious comfort Detachable cable A Direct Connection To Your Music Known for their engaging signatures and liquid smooth response, HD 660S predecessors HD 650 and HD 600 shattered performance barriers in the audiophile headphone category. The HD 660S