What electronic components do the sound quality of the amplifier depend on?

The sound quality is mainly due to the power amplifier part of the electronic components in the audio, the power amplifier is divided into the gall machine and the stone machine, the gall machine is the power amplifier of the tube using the glass shell, and the stone mechanism is the power amplifier made of transistor circuits and integrated circuits.

The evaluation of sound quality is a systematic project, which cannot rely on individual components to achieve high technical indicators. In addition to the selection of components, matching is also very important, as well as the manufacturing process and so on. It is recommended not to believe some fever claims, such as what op amp to change, what capacitor to change, and even more, some people have replaced the power fuse with a pure gold wire, saying that there is no resistance and no voltage drop, which is actually an unsafe practice, and it is best not to modify it without authorization, so as not to deteriorate the sound quality.

First of all, it is necessary to ensure that the power supply has sufficient dynamic power reserve, low ripple noise, especially the power supply of the pre-stage should be stabilized, and the ripple voltage should be as low as possible. If there is a coupling capacitor, a non-inductive electrode capacitor is selected, a metal film is used for the resistor, and a tube with higher FT parameters is used for the push stage and output stage. The circuit design should be as simple as possible, and the number of components of the whole machine should be reduced, which is actually to reduce the noise of the whole machine.

The above are just the basic requirements for the production of power amplifiers, and there are many details. The system is rich in even harmonic components and soft in timbre, and rich in odd harmonic components and hard in timbre, which is mainly determined according to personal preference and signal source content.

Good components are the foundation of a power amplifier.

However, the sound quality evaluation of the power amplifier is a systematic project, and it cannot rely on individual components to achieve high technical indicators. In addition to the selection of components, matching is also very important, as well as the manufacturing process and so on. It is recommended not to believe some fever statements, such as what op amp to change, what capacitor to change, and even more, a while ago someone replaced the power fuse with a pure gold wire, saying that there is no resistance and no voltage drop, so can it still be insured?

It seems that some people can still hear whether the power supply of the power amplifier is thermal power or hydropower.

Everyone's hearing is different, a power amplifier can not rely on subjective consciousness to evaluate the quality of the quality, the use of instruments can measure the technical indicators of the power amplifier, but the technical indicators are high does not necessarily mean that the hearing is good, just like someone likes symphony, some people like light **. It's hard to unify measurements.

This question of yours is a question that many audio enthusiasts are more concerned about. In the end, the tube power amplifier is good, compared with the transistor (integrated block power amplifier), its advantages are in**, the following is the advantages and disadvantages of the gall machine and the stone machine, ** my own opinion:

1. The sound of the gall machine is loud, shocking and powerful, the voice is high-pitched and full, and the distortion rate is small. The reserve power is large, and the high-power horn can be pushed to the peak effortlessly.

2. The stone machine (power amplifier) has carried out electronic crossover processing on the audio, so the sound level is relatively soft, so that the auditory sense of rhythm is relatively strong, the sound range level is relatively wide, the difference between high and low audio frequency is relatively large, and the three-dimensional sense is relatively strong, so that people have a fascinating and immersive feeling.

3. Due to the electronic audio processing, the distortion rate is high, and the nonlinear distortion is relatively large due to the limitation of the amplification circuit, which is prone to hoarseness and blockage, so that the treble can not go up when it is high, and it is not low when it is low, as people often say that it is boring.

4. The nominal power on the nameplate of the stone machine is very large, and the actual rated power is not large, which is why the nameplate of the stone machine is nominally hundreds of watts or even thousands of watts, in fact, it means the peak power, and the actual reason is that it is only tens of watts.

5. The production cost of the gall machine is high, bulky, requires a large amount of electric power, and the power consumption is relatively high, while the stone machine is more slight.

6. When the bile machine is working, the bile duct glows, which can add a beautiful scenery to the family.

To sum up, on the other hand, it is purely a personal hobby, some people like to play with the gall machine, and some people like to play the stone machine, in fact, the stone machine and the gall machine, each has its own advantages and disadvantages.

The biggest advantage of this chip is that it has output shock protection measures, so there is no need to use horn relay delay, which is most suitable for subwoofers, because the strong vibration of the subwoofer is easy to make the relay contacts jump.

It also has the function of squelch delay at start-up, and the final stage adopts the output of the field-effect power tube, so the chip has the taste of a gall machine.

3.Adopt the commercially common "fool block" 1100. The circuit is simple, no circuit board is used, the connection is completed, and it is also the output of the FET, and the effect is quite good.

1. The real top-level power amplifiers do not use power amplifier integrated circuits, they are all built out of discrete components;

2. The better Krell, McJingtu, Golden Voice, FM, which one uses power amplifier integrated circuits? Not a single one. Although Jeff Rowland used the LM3886 as a power amplifier, it was also a low-end product of Jeff Rowland;

3. Even if LM3886 is used as the power amplifier, different designers will have different processing, and the sound will be different;

4. Think about it, if the sound of the 3886 amplifier board sold for a set of tens to more than 100 yuan on the ** is the same as the sound of the amplifier made by Jeff Rowland with LM3886, Jeff Rowland would have closed down a long time ago;

5. Therefore, the sound quality of the top power amplifier chip model is really good.

Advantages of valve amplifiers.

1. The input dynamic range of the tube power amplifier is large and the conversion rate is fast.

2. The power amplification of electron tubes mostly uses discrete components, manual wiring, and welding, which has low efficiency and high cost. This is especially true in developed countries.

3. The open-loop index of the tube power amplifier is better than that of the transistor, and it can work stably without adding depth negative feedback and phase compensation capacitor, so its dynamic index is better.

4. The sound quality of the tube amplifier is generally soft and beautiful, more specifically, the low-frequency sound of the tube amplifier is soft and clear, and the high-frequency sound is delicate and clean. Expressing the human voice is its strong point.

5. The treble of the tube machine is smoother, there is enough air, and it has a kind of sound coloration that a considerable number of people like, and the soft and slightly blurred sound is very beautiful.

6. The tube amplifier is mainly caused by an even number of second harmonics, which is very pleasing to the harmonic component, just like adding rich overtones and beautifying the sound.

Disadvantages of valve amplifiers.

1. The life of the electron tube is low, and some technical indicators decline significantly after one or two thousand hours of use.

2. The tube amplifier consumes high power and often works in Class A state, which reduces the efficiency, but there are basically no harmful sound quality factors such as transient intermodulation distortion, switching distortion and crossover distortion.

3. Tube amplifiers have no advantage over transistor amplifiers in terms of weight, efficiency, and life.

4. In use, the tube should have good ventilation and heat dissipation, and the overheating of the temperature will inevitably shorten the life of the tube, so it is necessary to keep the tube at a low temperature as much as possible.

5. The electron tube is afraid of vibration, so it is also important to take shockproof measures to avoid vibration as much as possible.

The tube power amplifier can not be simple and the current power amplifier is better or worse, each has its own advantages and disadvantages.

Before the development of high-power transistors, only electron tubes were available as power amplifier circuits. Later, the transistor technology continued to mature, and the mature power amplifier circuit of the tube was also introduced into the transistor power amplifier. In the seventies and eighties, high-power amplifiers were still dominated by tubes.

At that time, compared with the two, the output power of the tube was large, not easy to damage, the overload capacity was strong, and the voice was warm, but the consumption was huge. Later, with the development of transistor technology, the power of transistors also increased, the protection and control circuits gradually matured, and the performance gradually improved, gradually replacing the electron tube. Now, some people who are looking for tube tone and nostalgia have turned the tube out again.

However, the trend of transistors is irreversible, and at the same time there are new developments in tubes. The two complement each other, coexist, and are people's choices.

In the early days, the transistor performance was poor and unstable, and the power amplifier was harsh, and the tube power amplifier had a soft sound without metallic sound. This feeling has always been remembered. In fact, the transistors are already very good now, and the well-designed transistor power amplifier is no worse than the sound quality of the tube power amplifier, and the dynamic is larger and the instantaneous response rate is higher.

If you only enjoy ** at home and don't pursue powerful bass, then it doesn't matter if the tube or the transistor. If you pursue the feeling of shocking fist punching chest, it is difficult for the tube to be competent, of course, if you do not hesitate to spend money.

The process of positioning the development of electronics as tubes, transistors, and integrated circuits may be right in computers or other fields, but in the field of audio power amplifiers, tubes are dominant, and the world's high-performance amplifiers, I mean amplifiers that cost hundreds of thousands, use transistors to account for less than 50%.

Which is better, tube amplifier or the current transistor amplifier? This is to analyze the difference between them. First of all, we have to start with the characteristics of the horn, there are three kinds of electric loads, inductive, capacitive and resistive, and the horn has these three properties, if the bass of the horn is required to be good, then use voltage feedback, the characteristics of the horn are that with the increase of frequency impedance also increases, the high-frequency power decreases.

If the treble is required to be good, then the current feedback is used, but the horn is over-excited at the fo. What to do, then use a compromise method, half of the voltage feedback and half of the current feedback. The tube power amplifier belongs to shallow feedback, and its nature belongs to half voltage feedback and half current feedback.

Transistor amplifiers are deep feeds, either 100% voltage feedback or 100% current feedback. If the transistor power amplifier is also connected to half voltage feedback and half current feedback, the effect is the same.

There are advantages and disadvantages in everything, depending on how it is compared.

Compared with the transistor in terms of electrical performance index, most of the parameters of the tube power amplifier are inferior to the transistor (or integrated circuit) power amplifier, but because of the physical structure of the tube, although the distortion of the tube is larger, but its odd harmonics are less, which is quite unpleasant to people's hearing, so relatively speaking, the sound of the tube is relatively better than that of the transistor (integrated circuit) power amplifier.

The tube power amplifier has a stronger overload capacity than the transistor power amplifier (the current power amplifier), such as lightning strikes, the transistor power amplifier, which burns out instantly, and the tube power amplifier, it's fine. And the sound quality is good.

The sound of the tube amplifier is better than that of the transistor amplifier!