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Sennheiser HD660S Headphones


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Found it cheaper? Click here. SKU: 508231
Ex VAT: £288.33

RRP: £429.00


Replacement for iconic HD650, HD660S is one of the best open dynamic headphones under £1000. This incredible feat is the next best thing to HD800 and incredible value for money.

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Condition: Brand new in original retail packaging

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Product Video


Warranty length 2 Years
Fitting Over Ear
Brand Sennheiser Headphones

Tech Specs

- Transducer: Dynamic, open
- Impedance: 150Ω
- Connector: Stereo jack
- Unbal: gold-plated 6.35mm
- Other: 3-pin 4.4mm, bal 5-pin
- Freq resp: 10–41000Hz (-10dB)
- SP Level: 104dB @1V 1kHz
- Coupling: Over-ear (circumaural)
- THD + N: <0,04% (1kHz, 100 dB)
- Weight: 260g (without cable)

Product Description

Sennheiser HD660S Headphones descend from the legendary HD 650, which feature an improved sonic performance with a new transducer design for the sophisticated audiophile that will perform in a large range of listening situations.

Audiophile Versatility

With their low impedance these headphones, do not require a huge amount of power to drive them, which means they are capable of delivering reference-quality sound when connected to hi-resolution mobile players, thus offering much greater versatility. The design of the HD 660S's is elegant and sophisticated with high-quality engineering, that you would expect from Sennheiser, that satisfies the most demanding of listeners with amazing aural precision and great wearing comfort.

Sound for the Passionate

Made for the most demanding of listeners, the HD660S eclipses the exceptional performance of its predecessor, the HD 650. The HD 650S feature a crisp bass response, an excellent true mid-frequency response, and pleasantly natural treble.  The HD660S has an expressiveness that submerges the listener in every emotive aspect of your music while always representing the sound in exceptionally accurate and transparent manner.


The HD660S's transducer is a new design which Sennheiser has developed; which due to its specially manufactured precision stainless steel fabric it gives greater control of the diaphragm movements.

Extremely light aluminium voice coils have been used to ensure high impulse fidelity. Also, the transducers are carefully selected and paired by hand to ensure consistently narrow (ą1dB) tolerances.

Supreme Connectivity

The ethos of the HD660S is to reproduce sound sources so you enjoy your music in supreme quality and from many differing audio sources. The low impedance allows for reference-class audio with portable high-resolution players.

Choice of Cables

The HD660S reveals its full potential when you connected it to a balanced dedicated headphone amplifier, such as the HDV 820 or to the balanced output of a mobile digital audio player.   Similarly, the HD660S comes with a choice of cables for just about any occasion. Furthermore, all the cables are made of highly conductive OFC copper, which features very low noise handling and sturdy para-aramid reinforcement.

High-end Comfort

Everything about the HD 660S ensures your listening experience always pleasurable, which is due to its strong yet lightweight open construction. The elliptical ear cups are ergonomically designed according to the outer ear (pinna), the thick padding on the headband and the replaceable ear cushions guarantee hours and hours of listening in supreme comfort.

Sophisticated Look

The pure and effortless sound of the HD660S is reflected in its new matt black and anthracite design. These headphones offer an aesthetic that combines contemporary style with timeless elegance, without compromising in its craftsmanship, like everything you would expect from the HD660S headphones.

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