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The Unison Research S6 was hailed by Hi-Fi World as “easily the best tube amplifier at the price” - a Class A design that uses 6 x EL34 valves and offers a rich, inviting sound that showcases the benefits of a carefully designed valve amp. It offers 35W per channel in triple-parallel single ended mode which might not sound like a lot, but you're rarely aware of any limitation if matched with average sensitivity speakers.
S6 offers excellent value for money with build quality and styling typical of a classic Unison Research products with a sound rich in refinement and authority.
The S6 is supplied with a lift-up protective grill and infra red volume remote control. Lovely EL34 velvety sound, but with bags of detail, grip and dynamics.
Rich, yet crisp incisive sound - subjectively very powerful...creates a big spacious soundstage with ample depth and width. Clarity is excellent; sharp, open and detailer'
'If you're new to valves and wonder what all the fuss is about, Unison Research's S6 would be the perfect introduction. It sounds absolutely gorgeous, delivering that sweet glowing richness that tubes are famous for, without loss of bite or immediacy'
'A clever compromise, the S6 gives a good helping of the low-level purity that single-ended triodes provide, yet decent power output and low noise. It has a clear, heart-warming sound.'
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