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Please find this Supex SD 900 E+ Super MC Moving Coil Cartridge for sale from my private collection.This is the legendary Supex 900 Super cartridge designed by Yoshiaki Sugano the Mastermind behind the KOETSU brand.The cartridge sounds absolutely amazing and is in excellent vintage and original condition.Very good cosmetics, the sound is full of music, great dynamics and details, the stylus is sharp and the suspension and cantilever is excellent as well. Best investment on your Hifi rig!wood box, tool, screws and specifications paper are included.Specifications:Type: Moving CoilOutput Voltage: 0.2 mVInternal Impedance: ~2.2 – 3 OhmsFrequency Range: 10 – 50,000 HzStylus Tip: 0.3 x 0.6 mil Elliptical DiamondTracking Force: 1.5 – 2.0 grams ( 1.9 worked best on my arm)Channel Separation: Better than 27 dBWeight: ~9 grams
At US$795, this sits far below the recent used-market median of US$3,430 and even under the 25th percentile of US$2,158, so it reads as a strong bargain if the cartridge is genuine and healthy. For a Koetsu/Supex-era moving coil, that is the kind of asking price that should get an enthusiast’s attention fast.
The upside here is the usual one with classic low-output MCs: a distinctive, musical presentation and a level of cachet that keeps them desirable long after newer designs arrive. The key buyer check is condition, since stylus wear, suspension age, and retipping history matter more than cosmetics on a cartridge like this; if it tracks cleanly and the seller can document its history, this looks like a very good buy.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Koetsu traces its origins to Japan in the late 1960s, founded by Yoshiaki Sugano, a remarkable polymath whose background as a boxer, artist, sword maker, and automotive executive fueled his passion for analog audio. Named after the 17th-century artist Honami Koetsu—a distant relative or inspiration—Sugano dissected existing phono cartridges to pioneer high-purity materials like 6N copper coils and rare platinum-iron magnets, driven by his love of Western classical music. He hand-built the first models, such as the Onyx, Rosewood, and Black, retiring from his Toyota/Ford career to perfect their musicality. Sugano passed away in 2002 at age 94, passing the craft to his son Fumihiko, who continued the tradition until his own recent passing, after which the family ceased production.
The brand focuses exclusively on handcrafted moving-coil phono cartridges, blending technical excellence with natural beauty through exotic bodies of stone, rare woods, and Urushi-lacquered finishes. Each cartridge features advanced components like boron cantilevers, line-contact diamond styli, samarium-cobalt magnets, and silver-clad copper windings, all voiced to Sugano's exacting standards on vintage turntables like the Garrard 401. Limited in quantity and available only through select retailers, these sonic masterpieces prioritize vinyl playback refinement over broader categories like amplifiers or speakers.
Koetsu commands reverence in the ultra-high-end market as the pinnacle of cartridge artistry, cult-favored for their poetic tonal delicacy, harmonic resolution, ethereal treble, and authoritative bass—qualities that redefined luxury analog in the 1970s at prices like $800 per unit. Though production has ended, originals remain legendary collector icons, blending generational Japanese craftsmanship with emotional fidelity that divides yet captivates discerning audiophiles.
See all Koetsu listings on RADAR.
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