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Stax Stax SRM 717 Headphone Amplifier Fully rebuilt and recapped Stax 717 Electrostatic Amplifier. (240v) These deliver insane power and detail to my Stax SR-007 Mk2 headphones. They enable the headphones to have some serious bottom end for an electrostatic. I'm selling the Stax SR-007 Mk2 as well in another ad. Please note the red line mark on the amp can be removed. I just had it there for reference. Happy to negotiate a lower price to sell the pair together, as they are a perfect match. Condition: Very Good Payment Method: cash, bank deposit Region/State: (VIC) Victoria/Australia By monke
At AUD 2,200, this used Stax SRM-717 is ambitiously priced against a tight local market where two recent comparable listings median at AUD 1,813 (25th percentile AUD 1,634, 75th AUD 1,992). That's a 20%+ premium over fair value for a solid unit in unknown condition—pass unless it's pristine with full provenance, as motivated sellers typically land closer to AUD 1,800 for these electrostatic drivers.
Buyers, verify the output stage first; these can develop channel imbalance or hum from aging capacitors after 5-10 years. Insist on original power cord, RCA/XLR inputs, and any Stax plugin modules included—replacements sting at AUD 200+. Test with your own electrostatic cans to confirm gain and imaging stay true to the SRM-717's legendary clarity.
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.
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