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I have owned these headphones from new and they come with the SRD-7SB which has upgraded speaker terminals.
A$200 is a strong bargain for a Lambda-era Stax if it’s complete and working properly. Against the recent AUD market, it sits well below the A$457 25th percentile and far under the A$898 median, so this is priced like a quick-sale opportunity rather than a normal ask.
What makes it worth chasing is the classic Lambda sound: very open, fast, and highly resolving, with the airy electrostatic presentation these are loved for. The upside is especially good if the pads, headband, and cable are healthy and the set comes from careful ownership; at this price, the main thing to verify is condition, since older Stax systems are only a great buy when the driver condition and included accessories are sorted.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Stax traces its origins to 1938 in Tokyo, Japan, when Naotake Hayashi founded Showa Kouon Co., Ltd. in Chiyoda-ku. Initially focused on wax disc recording, metal master production, and audio equipment for film soundtracks, the company evolved through the postwar era. In 1950, it launched its first high-frequency condenser microphone, adopted by NHK, and renamed itself STAX Co., Ltd. in 1963, honoring its pioneering Stax-1 mic. A brief suspension in 1995 due to economic pressures gave way to revival, preserving its legacy under family leadership.
The brand specializes in electrostatic headphones, known as "EARSPEAKERS," debuting with the world-first SR-1 in 1960. This innovation spawned enduring lines like the SR series, produced for decades with incremental refinements for superior resolution and staging. Stax complements these with dedicated electrostatic amplifiers and select accessories, eschewing conventional speakers, turntables, DACs, or cables to hone its transducer expertise.
Stax commands a niche high-end position among audiophiles and professionals, revered for unmatched transparency and fidelity that rivals cost-no-object loudspeakers. Its 85-year heritage cements it as a boutique icon in electrostatic technology, far from mass-market fare, appealing to discerning buyers seeking pinnacle sonic transduction.
See all Stax listings on RADAR.
