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Sennheiser HD 660S2 Open Back Wired Over-Ear Headphones (Near New)

iTEM CONdition: usedwith original box and accessories, near new condition.  2-month warranty included eBay Full Protection available on selected items (purchased... Read More
$549.00
$549.00
Out Of Stock

Change of Mind Returns accepted within 7 days of delivery. Customer provides return shipping.

Items must be returned in their original packaging and in the same condition as received. If the item does not meet our return condition policy, a full refund may not be issued.


Expect prompt delivery and easy tracking — every order comes with updates along the way.

About the Product

iTEM CONdition: used

with original box and accessories, near new condition. 

  • 2-month warranty included

  • eBay Full Protection available on selected items (purchased separately)

  • Tax invoice available upon request

  • All items are tested before listing. While we aim for top quality, occasional defects may still occur. However, your money-back is guaranteed. Return postage will be covered if the product is received defective.

  • Images are for illustration purposes; actual item may vary.

Item Description:
(For illustration purposes only. Please refer to Item Condition for details of the actual item.)

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. The extremely precise yet non-fatiguing sound of the HD 660S2 delivers even more impact with extended sub bass. With an optimized surround, transducer air flow, and coil our engineers doubled the sound pressure at the lowest octaves. You can feel the lowest note on the piano (27.5 Hz) or the kick of the bass drum (45-60 Hz) as if you were there. The relaxed tone and open-back design make this extremely comfortable headphone great for long sessions. With warm tuning, smooth treble, and strong bass, the standard-setter for extended listening is now the standard-setter for extended bass as well.

*The HD 660S 2 is a high performance audio product, and requires an adapter to connect to your mobile phone. For an ultimate audio experience, the HD 660S 2 is best paired with a small DAC or suitable amplifier.

Key Features

Audiophile sound
The natural, relaxed, high-fidelity sound (8 Hz - 41,500 Hz) offers an intimate listening experience with great timbre and deep, accurate sub bass.

42mm high-performance transducers
Steel mesh damping follows the driver’s geometry to control air displacement for precise sound.

Vented magnet system
The magnetic yoke includes milled air vents for optimal ventilation to minimize distortion.

Aluminium voice coil
Specially developed ultra-light voice coil with 300-ohm impedance for excellent impulse response.

Open-back earcups
Facilitate the natural expansion of sound waves for a hi-fidelity spacious soundstage.

Exceptional comfort
Open elliptical earcups provide breathability and luxuriously comfortable velour pads provide hours of fatigue-free listening.

Outstanding build quality
Designed in Germany, made in Ireland, each element is carefully selected to meet exacting standards.

Detachable cables
Para-aramid reinforced cables with OFC copper ensure signal integrity and a very low handling noise.

Ergonomic design
The low total weight and ergonomic headband eliminate potential discomfort on top of the head.


Brand: Sennheiser

Form Factor: Headband

Type: Ear-Cup (Over the Ear)

Number of Earpieces: Double

Model: Sennheiser HD 660S2

Connectivity: 3.5mm Jack

Features: Open Back

MPN: 700240

Colour: Black

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returns & refund

You can return most items within 30 days of delivery for a full refund or exchange.

Refunds are usually processed within 5-7 business days after we receive your returned item.