Schematic principle of a HI-FI tube power amplifier circuit

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Today's transistors and integrated circuits dominate the world, and the tube, the oldest amplifier that came out in the early twentieth century, seems to have been forgotten, but in the audio world, the originator of this HI-FI amplifier is not as good as it used to be, but Still attached to its irreplaceable tone and great dynamic appeal, the tube is the most respected in all HI-FI amplifiers. Since the birth of Williamson in 1947, the electronic tube has dominated. With the rapid development of digital audio technology and the popularity of digital audio, the electronic tube is timely integrated into this digital audio trend, which reproduces the charm of digital audio. Even more fascinating, coupled with the resurgence of electronic tubes that have quietly emerged at home and abroad, the electronic tube has gradually established its unshakable position in modern amplifiers, regaining its former glory. At present, the world's most expensive amplifiers are almost always made of tubes, and the best amplifiers and digital tube amplifiers for tubes are widely used.