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Sennheiser HD660S (Black)

Over Ear Open Back Headphones

In-store Clearance item

Open Box Guide Price (7 available across all stores) £359.950000
Last brand new price £429.000000
On Display Guide Price (7 available across all stores) £429.000000

Please remember

These are Clearance items and therefore condition and accessories / promo items supplied may vary. This is also why we use guide prices for in-store items, as managers price these units according to state and completeness.

Please call / email the store to check the price / stock / condition and reserve your Clearance bargain before making a special journey.

Unfortunately, due to costs, and size, TVs can't be mail ordered from store or transferred between stores - sorry!

Please note that extended guarantees are not available on these products.

Compare (3 max)
”Comfort and great sound quality make these excellent at-home headphones.” ’Trusted Reviews’.

A passion for music

Designed for the demanding listener, the Sennheiser HD660S offers an exceptionally balanced performance. Hand selected speakers are carefully paired, giving these headphones the most consistent sound between channels. Precision, stainless steel fabric diaphragms deliver life-like realism for a true-to-life sound.

Sound that ‘breathes’
Featuring an open back design, the HD660S headphones are able to produce a spacious, ‘out of head’ sound. Although these headphones will leak sound to the outside world, the sound inside is so life-like, it’s like being at your own private performance.

Balanced input option
Supplied with balanced and non-balanced cables, the HD660S maximises the potential of dedicated headphone amps and music players fitted with balanced outputs. Balanced cables minimise interference, enhancing the music’s purity.

Designed for comfort
When something sounds this good, you’re going to want to listen for a while. The HD660S remains comfortable for the longest listening sessions. Elliptical cups fit naturally around your ears, while the breathable earpads are soft to the touch, without being sticky.

Hear every element of music, with the Sennheiser HD660S.
Cable Length
Over Ear, Open Back
Plug size
4.4mm Balanced, 6.35mm Unbalanced, 3.5mm adaptor
Manufacturer's Warranty
2 years
Open back
Over Ear
Weight (KG)
260g without cable
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  • Representative 21.9% APR (variable)
  • Purchase rate 21.9% p.a. (variable)
  • Assumed credit limit £1,200
Subject to status. Terms and conditions apply. Richer Sounds Limited acts as a broker and offers credit solely from PayPal (Europe) S.a rl et Ice, S.C.A, 22-24 Boulevard Royal, L-2449, Luxembourg.
Klarna Payment Badge

Pay in 3 interest-free payments so you can spread the cost. No fees when you pay on time.

  • Add item(s) to your cart (up to £1500)
  • Go to checkout and choose Klarna 
  • Enter your debit or credit card information.
  • To check your eligibility, Klarna will perform a soft search with a credit reference agency. This will not affect your credit score.
  • Spread the cost in 3 interest-free payments. The first payment is made at point of purchase, with the remaining 2 payments scheduled automatically every 30 days. No fees when you pay on time.

You must be 18+ to use this credit offer. Credit subject to status. T&Cs apply. Klarna uses soft searches with credit reference agencies. These do not affect your credit rating. Missed payments can affect your ability to use Klarna. Pay in 3 installments complete terms.

Buy now, pay later available in-store or by phone, on most items over £500 *exclusions apply

We offer 6 and 10-month options.

Call your local store or our telesales team for details

For purchases over £500, you can settle the balance in 6 months, and in 10 months on purchases over £1000 and pay no interest whatsoever. If you settle part of your loan in the deferral period you won’t pay interest on that part. You can still pay off the loan sooner if you make additional payments. If you’d rather spread the cost over 36 months, you can set up a loan repayment plan when the payment-free period comes to an end at 19.9% APR representative. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. Richer Sounds Limited acts as a credit broker and not the lender. Creation Consumer Finance Limited acts as the lender. Find out more information and eligibility criteria here.