SUMO: Audiophile interview with Rich May of Sumo; an audio dynasty

John Atkinson writes ………… Way back in the mists of time, around 1980 to be exact, the Marantz company in Europe introduces a range of ostensibly cost-no-object solid-state electronics under the “Esotec” banner. Manufactured in Japan, but apparently designed in the USA, these ruggedly constructed components are noteworthy in that the power amplifiers are capable […]

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Building a Modified Mullard 5-20 Amplifier – by Dave Kimber

Dave Kimber writes ….. The Mullard 5-20 design is about 50 years old. It uses a pair of EL34 in almost Class A push-pull ultralinear configuration to give 20 Watts with very low distortion and up to about 30-35 watts with some distortion. The phase splitter uses a cathode coupled ECC83, driven by a directly […]

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Remembering a Heyday in Hi-Fi Industrial Design

Ben Bowers: Every step forward in the 1970s seemed to come with an equivalent step back. One President stopped shooting. Then his replacement was fired on twice. The Sears Tower rose and Three Mile Island fell. New cultural institutions were born in Saturday Night Live and Star Wars, while one of our oldest — the […]

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