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The Titans of Tone: A Comparative Guide to 211, 845, 813,...
In the world of high-fidelity audio, few components command as much reverence and mystique as large power tubes. Originally engineered for the demanding world of radio frequency (RF) transmission, tubes like the 211, 845, 813, and 811A have found a second life in the hearts of audiophiles. These "transmitting tubes" are prized for their linearity, power handling, and the unique sonic character they impart on music. They represent a departure from common audio tubes like the EL34 or KT88, operating at dangerously high voltages and requiring specialized amplifier designs.
This article delves into these four iconic tubes, comparing their origins, technical specifications, and sonic signatures. We will explore the classic rivalry between the 211 and 845 triodes, and contrast them with the rugged, high-power 813 beam tetrode and the high-gain 811A triode.
