RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
Supratek Grange signature Pre Amplifier Supratek grange signature with an excellent phono stage in black and chrome made in march “23”.The remote isn’t working as I think it’s the sensor but haven’t had fixed due to distance from repairers.Have original box so postage at buyers cost.Tubes used6J5 / E180F / 6E6P on the head unitPower supply6L6GC / 5AR4As there is only 6 of these out in the wildThe RRP is $5000 USD. Condition: Excellent Payment Method: EFT or cash on pickup Region/State: (NSW) New South Wales/Australia By beark 6 Comments Secure Ad AUD $4,800 Date: March 8Mar 8
Compared with a new phono stage or preamp at this level, A$4,800 is ambitious against the recent used market: it sits well above the A$3,474 75th percentile and nearly A$1,600 over the median of A$3,230. That doesn’t make it unreasonable for a top-tier Supratek, but it is priced at the sharp end rather than as a bargain.
What makes it interesting is the Supratek reputation: big, spacious sound, strong tonal color, and the kind of musical, valve-driven presentation people buy these for. Excellent condition helps, especially on a boutique tube piece where cosmetics and care matter. If it’s complete and the tubes are healthy, the real upside is getting a revered hand-built stage without the wait; just make sure the buyer values the sonics enough to justify paying near the top of the range.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Supratek is a Western Australian valve specialist founded by Michael Maloney, who brings more than 30 years of audio design experience to the company. After eight years of limited custom manufacturing, Supratek returned to full-time production with a dedicated facility and listening room in Margaret River, establishing itself as a serious player in high-end tube electronics. The brand's longevity and commitment to hand-built, point-to-point wired construction reflect a philosophy rooted in analog craftsmanship and meticulous attention to detail.
The company specializes exclusively in valve-based preamplifiers, with the Cortese serving as its flagship model. The Cortese features a 6SN7 triode tube design paired with a separate power supply and represents Supratek's commitment to cutting-edge tube topology. Notably, Supratek developed a world-first LCR phono stage compatible with moving-coil cartridges, delivering 80dB of gain—a technical achievement that underscores the brand's innovation within the tube preamp category. The company has also pioneered commercial DHT preamplifier designs, establishing itself as a technical innovator rather than a follower.
Supratek occupies the high-end boutique segment, positioning itself for discerning audiophiles willing to invest in bespoke, limited-production equipment. The brand's transferable lifetime warranty reflects confidence in its engineering and manufacturing standards. With hand-built construction, proprietary tube designs, and a track record of technical firsts, Supratek appeals to analog enthusiasts and collectors who prioritize sonic refinement and build quality over mass-market accessibility. Its Australian provenance and small-scale production model reinforce its status as a niche, artisanal manufacturer rather than a mainstream audio brand.
See all Supratek listings on RADAR.
