What is a tube amplifier? The role of tube amplifier

According to different types of power amplifier tubes, power amplifiers can be divided into tube amplifiers and transistor amplifiers. As early as the 1960s, tube amplifiers have become popular all over the world, but from the 1960s to the 1980s, transistor amplifiers began to gradually rise. By the 1980s, the number of tube amplifiers was very small, and now, the status of tube amplifiers Improvement has become a symbol of the status of global audio-visual enthusiasts.

Don’t you find it strange to see here? Why do so many people choose the tube amplifier instead of the transistor amplifier? What does it do? Let me take a look.

What is a tube power amplifier?

The so-called tube amplifier refers to a type of power amplifier using a tube as a power amplifier tube, also known as a tube amplifier. The sound is sweet and warm, the treble is smooth, there is enough sense of air, and it has a sound stain that a lot of people like. Although the sound details and levels are less, the soft and slightly fuzzy sound is beautiful.

The role of tube power amplifier

The tube amplifier has strong anti-overload ability. Even if the overload occurs, the peak of the music signal is only slippery than the normal waveform, and there will be no big difference in the sound.

Circuit diagram of tube amplifier

The open loop index of the tube amplifier is better than that of the transistor amplifier. It does not need to add deep negative feedback, nor does it need to add a phase compensation capacitor to work stably. The open-loop gain of the transistor amplifier is generally very large, and its excellent electroacoustic index is achieved by adding a large amount of negative feedback. Therefore, in order to suppress parasitic vibration, lag compensation is often used, which will cause obvious transient Distortion affects sound quality.


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