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High-Performance Audio Reviews
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Integrity High Fidelity Solutions showcased the Margules Audio U280-SC tube amplifier ($5399) that produces 70 watts per channel is Ultralinear mode, and can be operated as a monoblock for 130 watts. There's also a triode mode for this tube amplifier and it produces 40 watts stereo or 70 watts in mono. Frequency response is from 20 Hz to 55 kHz. The Margules Audio U280sc stereo unit employs active bias and a servo-controlled output stage. Internal parts include precision metal film resistors, polypropylene capacitors, and a tube compliment of four output valves being either 6550, KT99, KT88, KT100.
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