Scan code: LN133419 Manufacturer code: 700240

Sennheiser HD660S2 Open Back Headphones

Sennheiser - HD660S2 Dynamic Open Back Headphones

Scan code: LN133419 Manufacturer code: 700240
Order now and get it tomorrow, Fri 31st May
Get it Tomorrow, 31 MayIn stock
From £20.95 / month (APR 16.9%) or 0% for 4 months
Monthly Payment: £38.87
Instalment Rate: 16.9% p.a. (fixed)
Cost of purchase: £429.00
Total inc. interest: £466.39
Monthly Payment: £20.95
Instalment Rate: 16.9% p.a. (fixed)
Cost of purchase: £429.00
Total inc. interest: £502.72
Minimum Spend: £99
Instalment Rate: N/A
Cost of purchase: £99
Total inc. interest: £99
If you are approved for a credit limit with PayPal Credit and use it for future purchases, the APR for those purchases won't be more than 23.9% and may be even lower.

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Purchase Rate: 23.9% p.a. (variable)

Representative: 23.9% APR (variable)

Assumed Credit Limit: £1,200

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With a 10% deposit from just £11.40 / month (APR 19.9%)
Delivery Options
  • By DPD On 31st May to your specified address. | Free Receive SMS with one-hour delivery window Weekend, timed and European delivery options are available at checkout

    Have your parcel delivered by DPD to your specified address. Receive SMS with one-hour delivery window

    Weekend, timed and European delivery options are available at checkout
  • Collect instore Collect from our Bolton store, BL6 6PE | Free

    Order online, collect from our Bolton store (25-28 Enterprise Park, Middlebrook, Horwich, Bolton, BL6 6PE)

Audiophile Open-Back Headphones
Sennheiser - HD 660S2

Sennheiser - HD 660S2

'Dive deeper into legendary sound.'Enjoy your music on a completely new level. An intimate, relaxed sound signature combines with outstanding precision and exceptional comfort — and now, extended sub bass — for a deeply moving experience.

104dB(1 V)Sound Pressure Level

8 – 41,500 HzFrequency Response

300 ΩImpedance

At a glance • Uniquely powerful vented magnet system for minimized distortion
• Ultra-light aluminum voice coil with 300-ohm impedance for excellent impulse response
• Intimate sound with great timbre and deep, accurate sub bass
• Plush ear cushions and open design for maximum comfort
• Outstanding quality designed in Germany, made in Ireland

What's included • HD 660S2 headphones
• 6.3 mm cable (1.8 m), 4.4 mm cable (1.8 m)
• 6.3mm to 3.5mm adapter
• Carry pouch

Your New Desert Island Headphone

Sennheiser - HD 660S2

stunning resolutionEver felt goosebumps from sound so real, it was as if the source was in the room with you? The non-fatiguing HD 660S2 gives people who love music an intimate way to connect more deeply with their favorite songs and artists. Breathtaking resolution and precision take you closer than ever to instruments and vocalists. Yet the sound is natural and balanced, never harsh or brash.

This warm, inviting signature combined with extended sub bass makes listening uniquely pleasant and rewarding. And with comfort this good, it practically begs you to keep going for endless sessions. That’s how HD 660S2 combines the best of many worlds to give you an intimate experience you won’t want to live without.

Sub Bass Expands The Entire Sound

Sennheiser - HD 660S2

extraordinary precision and balanceTraditionally, audiophiles don’t get too excited about sub bass. It can easily get sloppy or boomy and become a distraction. And that’s a shame — because there’s so much more to experience here than just the gut punch of a kick drum. Did you know the low B of a 5-string bass vibrates at 30.9 Hz? Or that the lowest note on a concert piano comes in at 27.5 Hz? And of course, extended sub bass makes bass-heavy genres sound fantastic, too.

And that’s the magic trick here. In doubling the sound pressure at the very lowest frequencies, we’ve nevertheless retained extraordinary precision and balance throughout the sub bass, mid-bass, and beyond. Most impressive is how this affects the listening experience. Extension on the low end changes everything — by creating more space for the sound. Against a deeper backdrop, highs feel more brilliant, the soundstage deeper, emotions stronger.

'Some Things Just Feel Awesome To Wear'

Sennheiser - HD 660S2

They feel as great as they soundThe velour earpads of the HD 660S2 can only be described as a tactile pleasure. With just the right amount of tension for proper acoustic positioning and supple padding, the headband won’t draw attention away from your music, either. As an open-back design, the HD 660S2 gives your ears an extremely comfortable climate, even for super-long sessions.

Sennheiser - HD 660S2

How do you one-up a line of legends?The surround is now more compliant, too, dropping the resonant frequency to 70 Hz. Considerable effort also went into optimizing the airflow around the transducer. There’s more sensitivity over the entire frequency spectrum because the magnet´s air gap works more efficiently now. Taken together, these measures result in even greater precision, speed, and resolution — with double the sound pressure at the lowest frequencies.

The Tech Spec

Features Specification
Transducer principle dynamic, open
Transducer size 38 mm
Frequency response 8 – 41,500 Hz
Impedance 300 Ω
Sound pressure level (SPL) 104 dB (1 kHz, 1 Vrms)
Total harmonic distortion (THD) <0.04% (1 kHz, 100 dB)
Ear coupling Over-Ear
Weight 260g
Adapter 6.3 mm (1⁄4 inch) to 3.5 mm
Connector 6.3 mm (1⁄4 inch) jack plug, 4.4 mm balanced plug
Cable length 1.8m
Country of origin Ireland
Magnetic field 2.5mT
Headphone Type Open Back
Style Over Ear
Driver Type Dynamic
Headphone Connector Type 6.3mm Jack
Includes Adaptor Yes
Impedance 300 Ohm
Microphone No
Detachable Cable No
Cable Length 1.8 m
Weight 260 g
Sensitivity 0 dB/mW
Additional Information
Scan Code LN133419
Model Number 700240
GTIN 4260752330374

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

24 months
Return to base
DOA Period:
28 days
RTB Period:
24 months
Manufacturer Contact Details
Scan on behalf of Sennheiser
0871 472 4747
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Sennheiser HD660S2 Open Back Headphones
Sennheiser HD660S2 Open Back Headphones