![]() The SIMPLY TWO, with its 12 watts per channel of power, enjoyed enormous success. This amplifier marked the beginning of a long series of models based around a single-ended Class A output stage. The first integrated amplifier introduced by Unison Research was the TRIODE 20, which used two pairs of push-pull E元4s in a Class AB circuit.Īn important page in the history of Unison Research was written with the introduction of the SIMPLY TWO. The motivation was not because integrated amplifiers are either easier or less expensive to produce, but because integration can give real benefits by optimizing the interface between preamplifier and power amplifier stages, and also by eliminating interconnecting cables which, as well as adding cost, introduce (even in the case of the best cables) some degradation to the sound. The constant search for improvements to sound quality led Unison Research to more thoroughly investigate and experiment with the design of integrated amplifiers. The NIMBLY was switchable between triode and pentode operation to give 25 watts or 50 watts according to the mode selected. These were followed by the NIMBLY, an all-valve power amplifier using KT88s tubes in a push-pull circuit. Among the first products to wear the Unison Research badge were the GLOWY, a full function preamplifier using 5 twin-triodes in an all-valve circuit, and the RULER, a fully solid state amplifier with an output of 80 watts per channel. After completing a degree course in electronics he dedicated himself to teaching for 25 years, while at the same time developing and designing all the products for Unison Research. Signor Sacchetti was born in 1945 and inherited from his father – an accomplished pianist – both an understanding of and passion for music.įrom a very early age he began to experiment with building amplifiers, which of course in those pre-transistor days were all valve-powered. ![]() Unison Research was founded in 1987 by a small group of audiophile enthusiasts led by Giovanni Maria Sacchetti. Giovanni Sacchetti at work in the Unison Research factory. ![]()
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