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A valve audio amplifier or vacuum tube audio amplifier is a valve amplifier used for sound reinforcement, sound recording and reproduction. Until the invention of solid state devices such as the transistor , all electronic amplification was produced by valve (tube) amplifiers.
Tube sound (or valve sound) is the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube-based audio amplifier. [1] At first, the concept of tube sound did not exist, because practically all electronic amplification of audio signals was done with vacuum tubes and other comparable ...
McIntosh Laboratory is an American manufacturer of handcrafted high-end [1] [2] [3] audio equipment headquartered in Binghamton, New York. [4] [5] It is a subsidiary of McIntosh Group, which in November 2024 was acquired by Bose Corporation, a fellow American audio company..
This means that class AB and B amplifiers produce their lowest distortion percentage at near maximum amplitude, with poorer distortion performance at low levels. As the circuit changes from pure class A, through AB1 and AB2, to B, open-loop crossover distortion worsens. Class AB and B amplifiers use NFB to reduce open-loop distortion.
One reason: It offered audiophile-quality sound at a price that made it accessible to a wider audience. Its tube-based design delivered warm, rich audio that rivaled far more expensive amplifiers.
Audiophile amplifiers are available based on solid-state (semiconductor) technology, vacuum-tube (valve) technology, or hybrid technology—semiconductors and vacuum tubes. Dedicated amplifiers are also commonly used by audiophiles to drive headphones, especially those with high impedance and/or low sensitivity, or electrostatic headphones.