RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
As new, this lands above the AUD 932 median but still below the AUD 1,822 75th percentile, so the AUD 1,415 asking price reads as fair-to-slightly-strong rather than a bargain. For a clean, presentable Stax energiser, that’s a reasonable place to be if the photos and provenance back up the condition.
The SRM-400S is a respected step-up in the Stax world: quiet, capable, and a good match for getting the most out of Lambda-type earspeakers without chasing rarer vintage units. The upside here is the likely low-drama ownership of an “as new” piece, which matters with electrostatic gear. I’d want confirmation of original packaging, cables, and that it’s been properly tested at 240V, but there’s no obvious red flag if the condition is genuine.
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.
