Family business from Lower Saxony with worldwide success

Audio specialist Sennheiser, headquartered in Wedemark near Hanover, Germany, is one of the world’s leading manufacturers of headphones, microphones and wireless transmission technology with its own production facilities in Germany, Ireland and the USA.

The history of audiophile sound begins with the HD 414. The world’s first open headphones revolutionized the headphone market in 1968. To date, the HD 414 remains one of the best-selling headphones in the world with more than 10 million copies sold.

Another milestone followed when Sennheiser’s engineers combined the principle of open headphones with the principle of electrostatic sound converter technology for the first time. In 1977, Sennheiser introduced the Unipolar 2000 and delighted the professional world. The underlying principle was once again an innovation in the audio world.

From a flood of new headphones in 1991, the electrostatic Orpheus HE 90 / HEV 90 truly stands out. With no less a claim than to build the best headphone in the world, the Sennheiser developers had gone back to work and surpassed once again the expectations of the audio industry with this electrostatic headphone and its impressive tube amplifier. Due to its extremely elaborate processing, the Orpheus is limited to 300 copies. To this day, the legendary headphone remains the benchmark for audiophiles in terms of hearing and all high-end models developed by the audio specialist Sennheiser.

The latest reviews: Sennheiser

Bluetooth by Sven Opitz 1 week ago

Sennheiser CX 400BT True Wireless

True Wireless in-ears with a 20-hour battery life

Sennheiser want to demonstrate that — in addition to their excellent Momentum True Wireless, which are right at the top of the charts both in terms of hit lists and price — they are quite capable of catering to the upper mid-range of the market....


Bluetooth by Maike Paeßens 6 months ago

Sennheiser HD 450BT

Portable Bluetooth over-ears with ANC and a long battery runtime

Sennheiser's HD 450BT wireless over-ears support high-quality audio codecs with AAC as well as aptX, they also offer low latency for watching movies and playing computer games thanks to aptX LL. For everyday use and when travelling, they also benefit from exceptionally long battery life,...


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Editor's recommendations: Sennheiser

Sennheiser succeeds in creating a masterpiece with the HD 660 S. The headphones deliver true audiophile sound quality that’s perfectly balanced when required. These are best enjoyed with a quality amplifier when listening at home, but holds up well for professional evaluation and editing of material in the studio. For just shy of 500 euros, you can have a headphone model that plays at the same levels of a high-quality loudspeaker and immediately ranks at the top of its class in terms of price.

Ulf Kaiser
Ulf Kaiser 6. February 2018

Sennheiser chooses the approach of evolution instead of revolution: maintaining the overall concept, but introducing improvements in detail. The second generation offers the same high level of choice of materials, workmanship and sound. A clear recommendation to buy!

Ben Seemann
Ben Seemann 1. July 2016

The 2019 version of the Sennheiser HD 660 S remains a pair of open over-ear headphones worth every cent. The model has received a discreet cosmetic update that makes these headphones look slightly more contemporary and higher quality. This overhaul was not detrimental to their handling, and in terms of sound, the strengths of these headphones have not changed either.

Distortion-free sub-basses, high speech intelligibility, slightly attenuated treble and fine super-high-frequency reproduction characterize the sound image of these headphones. And the HD 660 S are also convincing in terms of signal resolution, stereo impression and depth graduation. Lively dynamics and freedom from distortion up to the highest volume also make these headphones a real powerhouse.

The Sennheiser HD 660 S are suitable as a hi-fi tool for enjoying classical, jazz and pop music, but due to their sound profile, they are also ideal as an analytical headphone for studio use.

Carsten Kaiser
Carsten Kaiser 18. June 2020
Sennheiser HD 660 S (New Version 2019)