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Sennheiser HD 660S2 Headphones - Over/On Ear Headphones in excellent condition, includes Box and Cables Condition: Excellent Payment Method: EFT, Cash On Pickup Region/State: (SA) South Australia/Australia By Atomlab 0 Comments AUD $400 Date: March 2, 20251 yr
Is A$400 a genuine bargain for the Sennheiser HD660S2 in excellent condition? Yes, this is a strong deal because the asking price sits well below the 25th percentile of A$414 from your database, undercutting the median of A$421 by over A$20. While new units still retail around A$765–A$899, finding this model in excellent condition for A$400 represents immediate value against both new and typical used market anchors.
The HD660S2 is highly regarded for its natural, open sound and extended high-frequency detail that rivals more expensive audiophile headphones, making it a standout upgrade from the classic HD600 series. At this price, the upside is significant: you secure a modern, well-built dynamic driver with a 300-ohm impedance that pairs beautifully with quality amplifiers, all without the risk of age-related wear common in older models. With excellent condition confirmed and no missing accessories noted, this is a clear buying opportunity for a fellow enthusiast.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
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.
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