Tube Guides

Learn how to choose a DIY tube amplifier kit by difficulty, amplifier type, package contents, documentation, system compatibility and safety.

Simple answer: A hybrid tube amplifier combines vacuum tubes with solid-state electronics. The tubes normally handle part of the signal amplification, while transistors, operational amplifiers or Class D circuits provide buffering or output power. Hybrid tube amplifiers are common in affordable desktop audio systems because they can provide replaceable tubes, compact dimensions and useful output…

Simple answer: A tube amplifier is an audio amplifier that uses vacuum tubes, also called valves, to increase the strength of an audio signal. Depending on the design, tubes may be used in the preamplifier stage, power-output stage or both. Tube amplifiers were widely used before transistors became common, but they remain popular in home…