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HD 660S Refurbished

HD 660S Refurbished

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Numero di articolo: B508826

Product Description

Sennheiser’s new HD 660S is the ideal open, dynamic headphone for the passionate audiophile. Meticulously crafted from hand selected components and specially developed acoustic materials, it delivers incredibly low harmonic distortion for an exceptionally natural, lifelike audio experience. With a lower impedance of 150 ohms, the HD 660 S offers the versatility to enjoy reference class high fidelity sound with stationary and mobile players alike.

Wearing style Headband
Color matte black
Frequency response (Headphones) 9 – 41,500 Hz
Sound pressure level (SPL) 104 dB
THD, total harmonic distortion < 0,04%
Contact pressure 6.0 N ± 1 N
Ear coupling circumaural
Connector 6.35 mm / 4.4 mm Pentaconn
Cable length 3 m
Transducer principle Dynamic, open
Nominal impedance 150 Ω
Weight w/o cable 260 g

Customer Reviews

Based on 8 reviews

Extremely happy with the decision to buy ‘refurbished’ - they look absolutely brand new! Very impressed. For me their sound is near perfect: nicely controlled bass, detail and clarity. Highly recommended.

well-known brand and a great product

Great product for consumer and pro users. For very critical listeners its better to calibrate with REW or similar tools.
Further, the product is in a new state, it is absolutely worth money spent.

Refurbished are as good as new

I had one retail pair beforehand, and bought this refurbished set to use as PC headphones. My new motherboard (MSI Z690i Unify) has great support with headphone impedance sensing, so no need for external AMP/DAC with the 660s. Very happy with the sound quality, and the ease of wear.


Nice and tightly controlled bass. Mids are neutral and detailed (not forward or recessed). Highs are balanced but not piercing and sharp. Driver and pad burn-in was very quick (<10 hours) and sound improved and became more cohesive.

10/10 build quality and comfort. 9/10 overall…would have liked a bit more sub bass extension.
Overall happy with the purchase, my favorite of the 6 series.


Best sounding headphones I've ever owned. Look almost brand new other than some damage to the original box.