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Offered is „Sinfonia“ by Unison Research as second-hand device from the category „Tube-Fullamp“ on audio-markt.de - the online market place for high-end. The advert with the number 6356489067 ends on 27.12.2026 at 19:53 o'clock.
The Sinfonia is a notably refined, dual-mono Class A valve integrated, and €2,900 is a fair price rather than a bargain: it matches the median of three comparable listings, sitting above the €2,743 25th percentile but well below the €3,666 75th percentile.
Its appeal is the combination of beautiful build, smooth yet dynamically capable sound, and unusually convincing bass for a 25W amplifier. The 4/8-ohm outputs, remote volume, and line-level subwoofer output make it more practical than many purist valve designs, while the dual-mono layout and quality transformers support excellent separation. With a clean chassis, working remote, healthy valves, and no hum or channel imbalance, this looks like a worthwhile, properly valued example rather than an inflated listing.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Unison Research, an Italian hi-fi icon, traces its roots to 1987, when it was founded in Treviso by Giovanni Maria Sacchetti, a visionary electronics engineer and music enthusiast born in 1945. Sacchetti, who balanced a career in teaching with amplifier design, assembled a team of dedicated audiophiles driven by a singular passion: delivering profound musical pleasure through superior sound. From its inception, the company emphasized handmade craftsmanship entirely within Italy, evolving under subsequent leadership like Giovanni Nasta while honoring Sacchetti's legacy of innovation in tube-based audio.
The brand excels in valve amplifiers, its core strength, with legendary models like the Triode 20—the first integrated amp Sacchetti designed—and the Simply Two, which sold over 30,000 units and propelled global acclaim. Early offerings included the Glowy preamp and Ruler power amp, pioneering designs such as the first stereo amplifier using the 845 triode. Today, Unison Research offers a focused lineup of preamplifiers, power amps, integrated amplifiers, and select speakers in partnership with Opera Loudspeakers, prioritizing pure analog warmth over digital peripherals like DACs or headphones.
Positioned as a high-end boutique leader, Unison Research reigns as Italy's top tube amplifier producer and ranks among Europe's elite ten. Audiophiles worldwide revere its products for their emotional depth, artisanal quality, and timeless appeal, cementing a niche among discerning buyers seeking authentic, soul-stirring hi-fi that transcends mere technical specs.
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