The 4-300B audio power triode was originated by the Western Electric division of AT&T in 1935 and used at first in movie-theatre amplifiers, later in regulated power supplies. This tube has developed a cult following in the audiophile world particularly in Japan and other Asian countries. The Golden Dragon 4-300B is closely modelled to the original and is a high quality tube sourced in China at a competitive price and built to UK specification.
