Output transformerless
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Output transformerless is a type of vacuum tube audio power amplifier, which omits an output transformer for the purpose of greater linearity and fidelity. Conventional vacuum tube amplifier designs r
OTL tube amplifier Model H3 as designed by Julius Futterman in 1965 (long-term exposure)
Audio power amplifier
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An audio power amplifier amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or
Output transformerless
…Output transformerless (OTL) is a type of vacuum tube audio power amplifier, which omits an output transformer for the purpose of greater linearity and fidelity. Conventional vacuum tube amplifier designs rely upon an output…
Audio stereo power amplifier made by McIntosh
The internal view of a Mission Cyrus One hi-fi integrated amplifier (1984)
De Forest's prototype audio amplifier of 1914
McIntosh MC240 from 1961, with exposed vacuum tubes