Sennheiser HD 660S2

Original price was: €599,00.Current price is: €490,00.

Sennheiser HD 660S2 Dynamic open-back headphones have a crisp bass, excellent mid-frequency slightly warm response, and a sweet, natural treble. The new 38mm transducer has better control of diaphragm movements thanks to a specially manufactured precision stainless steel fabric.

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The new Sennheiser HD 660S2 open-back dynamic headphones are already a classic on its own. The company has made some significant design changes to let this model excel again and bringing music standards back to its core. One of these changes is the redesign of the extremely light aluminum voice coils ensure maximum fidelity of the impulses. The 38mm high-performance transducers are carefully selected and hand-matched to ensure consistently tight tolerances (±1 db). Bringing this open-back dynamic headphone also back to an impedance of 300 ohm.

The Sennheiser HD 660S2 reveals its full potential optimally when connected to the balanced outputs of a dedicated headphone amplifier or the balanced output of a mobile digital audio player. It will even be better even the amplifier was designed specifically for higher impedance headphones. Ask one of our advisors for the best possible match with this headphone.


Exceptional Comfort

Exceptional comfort and build quality: The open-back design and plush ear cushions offer exceptional breathability for long listening sessions– The velour earpads of the HD 660S2 can only be described as a tactile pleasure– The low total weight and ergonomic headband rule out any potential discomfort on top of your head as well. Combined with excellent build quality made in Ireland, you’ll quickly grow attached to a listening experience that’s as physically pleasing as the warm, non-fatiguing sound at its heart.


In the box

  • Sennheiser HD 660S2 wired over-ear headphones
  • 1.8m cable with 6.3mm connector
  • 1.8m Balanced cable with 4.4mm Pentaconn
  • 6.3mm (F) to 3.5mm (M) adapter
  • Carry Pouch

Sound Kitchen Headphone amplifier tip: Fidelice Precision headphone amplifier or Rupert Neve RNHP headphone amplifier


  • Impedance: 300 ohms
  • Connector: 6.35mm/4.4mm Pentaconn
  • Frequency Response: 8 – 41,500Hz (-10dB)
  • Sound Pressure Level (SPL): 104dB at 1V 1kHz
  • Ear coupling: Over-ear (circumaural)
  • THD+N, Total Harmonic Distortion & Noise: <0.04% (1kHz, 100dB)
  • Transducer principle (headphones): Dynamic, open
  • Weight without cable: Approx. 260 g (without cable)