Sennheiser HD660 S Headphones

Sennheiser HD660 S Headphones

Free UK Delivery

In Stock
On Demo

Regular Price: £429.99

Special Price £395.00



Key Features

Reference-class open-back, dynamic headphone employing improved transducers delivering low harmonic distortion
Para-aramid reinforced, detachable cables employ high conductivity OFC copper to insure signal integrity with very low handling noise
Transducers are hand-selected for precise ( 1 dB) left / right matching tolerance ensure ideal accuracy and presentation of stereo spatial characteristics
150-ohm nominal impedance allows direct connection to home and mobile hires audio devices
Supplied with two connection cables: One with a 6.35 mm stereo plug, the other a 4.4 mm Pentaconn balanced stereo plug, also included is a 6.35 mm to 3.5 mm adaptor
Frequency response is 10 – 41,000 Hz (-10 dB)

Sennheiser HD660 S Headphones

The HD 660 S is the successor to the legendary HD 650 with an improved transducer design. Lower impedance compared to its predecessor means that it is easier to drive and can be used with portable media players as well as conventional hifi systems. Being able to be used on portable devices does not mean that Sennheiser have sacrificed sound quality, however, and the HD 660 S's feature balanced inputs for use with high-end equipment. Attention to detail applies to every aspect of these headphones as the transducers are selected and paired by hand so that the sound coming into each ear is as close as possible.

With a tight bass, superb mid-frequency response, and a gentle, natural open treble, the HD 660 S is a headphone that must be listened to, to believe. 

Who is Sennheiser?

Sennheiser design and construct some of the most highly regarded headphone models on the market today, and are commonly thought of as 'THE' headphone manufacturer for casual listening, studio monitoring, and for critical, audiophile reference. Sennheiser offers a vast range of models with a familiar design concept; to offer the best possible sound and build quality at all price points.


Design Open Over-Ear
Impedance 150 Ω
Frequency Response 10 – 41,000 Hz (-10 dB)
Sound Pressure Level 104 dB at 1V 1kHz
THD + N @ 1 kHz < 0,04%
Weight 260g

Providing your item is in stock, the order is usually dispatched within 24 hours. Postage and packing is completely free for orders over £100*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.


Orders are sent via our couriers' DPD on a next-day-delivery service and usually, take between 1 and 3 days. 


Please use this link to find more detailed delivery information.


*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however, delivery to these locations will incur a charge and can only be sent via a 2-day service.

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