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Is A$635 a fair price for a used Sennheiser HD660s when the median market ask is A$420? This listing is ambitious, sitting A$215 above the median and well past the 75th percentile of A$526, meaning you are paying a premium with no listed condition details to justify it. Unless this is a pristine, original-owner unit with a full box of accessories, the price is hard to defend against the current AUD market.
The HD660s remains a top-tier open-back choice for its natural timbre, punchy bass, and smooth treble that avoids fatigue. It excels with vocals and acoustic tracks, offering a refined sound that rivals more expensive models. However, at A$635, you should only proceed if the condition is verified as excellent and the seller includes the original cable and case; otherwise, the A$420 median offers a far smarter entry point into this well-regarded headphone.
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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