Tube-amplifier meaning

An audio amplifier that uses vacuum tubes instead of transistors. Most aficionados of high-quality audio believe that vacuum tubes provide a more musical and more pleasing sound than transistor-based amplifiers. These are subjective opinions that often depend on the hearing ability of the listener. Many people cannot hear much difference between medium-quality and high-quality sound systems. Nevertheless, the most expensive amplifiers are tube based, and high-end preamplifiers may also use only tubes (see preamp). See hybrid amplifier, audiophile, stereophile, high-resolution audio and vacuum tube.
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