The word "tube" refers to the electron tube. The tube amplifier that everyone often talks about refers to the amplifier that uses the electron tube. Some electron tubes are used for amplification, and some are used for polishing. The tube amplifier has its unique "tube flavor", with warm and pleasant sound, good musicality, and good atmosphere. The tube amplifier is the oldest and most enduring evergreen in the audio industry. Its significant advantages are sweet and soft sound, natural concern, especially the large dynamic range and good linearity, which cannot be easily replaced by other devices.
[Attachment: A casual discussion on negative feedback of tube amplifiers (Part 1)]
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