The U280SC high end tube amplifier, with over 20 years of evolution, is positioned as a sonic reference thanks to its ability to produce a sweet, lively natural sound, full of detail, richness and precision.
Its full Class A, adjustments free design, has turned it into a favorite in the demanding audiophile community for its abilities to drive a wide variety of loudspeakers.

· Ultra High-End review 2015
· Dagogo review by Jack Roberts
· Dagogo review by Sandy Greene
· Positive Feedback 2010 por Francisco Duran
· Sterotimes 2008 por Craig Fitzpatrick
· Enjoy the Music, Ron Nagle
· Soundstage 1999 por Mike Masztal
· Reporte del CES 2006 por Francisco Duran, Positive Feedback
· Reporte del CES 2006 por Dave Thomas, Stereotimes
· Reporte del CES 2006 por Doug Schneider, Soundstage LIVE
· Reporte del CES 2003 por Greg Weaver, Stereotimes
· Reporte del CES 1999 por Paul Knutson, Secrets of Home Theater and High Fidelity
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