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Seller's Description

Erg goede headphones. Hij werkt uitstekend. Wel wat lichte beschadigingen aan de zijkanten van het neerleggen. Wordt geleverd met alle originele kabels, waaronder een lange kabel met 6.3Mm jack en een

Our Thoughts RADAR AI

This €175 listing for the Sennheiser HD660s is a strong bargain, sitting well below the 25th percentile of €216 from your ground truth data and significantly undercutting the typical used market range of roughly €185–€235. At this price, it is an exceptional buying opportunity that offers far more value than the median €257 or even the ambitious €320 high end.

The HD660s remains a legendary mid-fi headphone prized for its natural, open soundstage, deep bass extension, and smooth treble that avoids fatigue. It excels in critical listening and music immersion, delivering a refined experience that rivals much more expensive models. Since the asking price is well below the median and the condition appears clean, there are no material caveats to raise; this is a rare chance to own a highly respected audiophile staple at a price that rewards the buyer immediately.

Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.

About Sennheiser

Founded in June 1945 by Dr. Fritz Sennheiser in a farmhouse near Hanover, Germany, Sennheiser began as Laboratorium Wennebostel, producing voltmeters and early microphones amid post-World War II reconstruction. Seven engineers from the University of Hannover joined the founder, quickly pivoting to broadcast microphones like the DM 2 in 1946 and the groundbreaking MD 82 shotgun mic in 1956. Renamed Sennheiser electronic in 1958, the family-owned company passed to second- and third-generation leadership, maintaining its innovative spirit over eight decades.

Sennheiser excels in professional and consumer audio, renowned for microphones, wireless systems, and headphones that set industry standards. Pioneers of the first open-back headphones (HD 414 in 1968) and enduring studio icons like the MD 421 and MD 441, they also produce high-end headphones, earbuds, soundbars, and conferencing solutions. While strong in pro audio like mixers and geophysical gear, their consumer focus centers on headphones and wireless tech rather than amplifiers, speakers, turntables, DACs, or cables.

Sennheiser commands a premium position in the hi-fi market, blending mid-tier accessibility with high-end excellence for discerning buyers and professionals. Trusted for reliability and sonic precision, it appeals to audiophiles seeking reference-grade headphones without boutique obscurity, backed by a heritage of technological firsts that sustains its global leadership.

See all Sennheiser listings on RADAR.

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