Some people say that \"gall\" is good, and some people say that \"stone\" is good. After decades of arguing about this topic, it is observed that low, medium and high frequencies are related to people\'s personality and age. The older people are, the less they like bass and treble, especially many elderly people, who dislike bass even more. The sound of \"gall\" is soft and charming, and the mid-frequency is prominent, so \"gall\" can please the ears of many older people. It is found that most of the people who play \"gall\" are older, and most of the people who play \"stone\" are young people. They have been arguing about who is better! I think that no matter what machine you play, \"gall\" and \"stone\" are equally good, as long as you like it, it is good! Now let\'s talk about the tube machine (electronic tube machine) which is sought after by many audio enthusiasts for its soft and pleasant sound quality. It is different from transistors in the following aspects: 1. The circuit structure of transistors is more complex than that of electron tubes; 2. The collector current of transistors is basically not affected by the collector-emitter voltage Vce, while the anode current and anode voltage of electron tubes basically conform to the Ohm\'s law; 3. Transistors are easily affected by temperature, while temperature has less effect on electron tubes; 4. Transistors work in a low voltage and high current state, so the power supply requirements are high; while electron tubes work in a high voltage and low current state and the power supply requirements are relatively low; 5. Transistors are current-controlled devices with low input and output impedances, while electron tubes are voltage-controlled devices with high input and output impedances, so electron tube amplifiers must have an output transformer to match the load. Due to the electromagnetic inertia of the output transformer and the narrowing of the transmission frequency band (especially the high frequency band), the audio signal is softened and the sound quality sounds soft (in fact, this is not high fidelity); 6. The overload capacity of electron tubes is stronger than that of transistors, so the dynamic range is relatively higher than that of transistors, so the sound sounds more pleasant. Tube amplifiers are known for their feminine sound; transistor amplifiers, commonly known as stone amplifiers, are known for their masculine sound. The advantages of transistor machines are large current, wide frequency band, low-frequency control, analytical ability when handling large scenes, and layering and brightness are superior to tube amplifiers. However, the treble of tube machines is smoother, has enough air feeling, and has a sound coloration that quite a number of people like. Although the sound details and layers are less, the soft and slightly fuzzy sound is beautiful.
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