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Supratek Cabernet 6SN7 Pre Amplifier The Supratek Cabernet 6SN7 needs no introduction, what a wonderful reputation these preamps have and for good reason, they paint a picture that can make a grown man cry! I'm going back to solid state for a while, plan is to change out just about everything.. as retirement is just up the road for me I'm moving up the audio scale and aiming for my end game system. I will go tube pre again as this thing sang wonderfully drving my Krell and ML amps into Proac and Harbeths though next time it will be Supratek Grange custom. So up for sale this baby goes. I'm
At AUD3,450, this Supratek Cabernet 6SN7 preamp sits at the ambitious end of the used market—typical listings for similar Supratek tube linestages hover around AUD2,000-AUD3,000, depending on condition and options like the dual linestage setup. It's no steal, but if it's low-hours with original tubes and transformer, it could justify the stretch for that signature Supratek warmth and detail.
Buyers, verify the power supply is included and functioning—Supratek separates these, and mismatches kill the magic. Check the 6SN7 tubes for noise or microphonics, as they're prone to age-related haze, and probe for output coupling cap issues, common in tube preamps over 10 years old that can smear the highs if drying out.
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.
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