Let me first talk about the difference between an amp and a decoder. This is a lot of people are rather confused. Can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t tell what function they are. What are the advantages of each promotion,

first of all. If your device has a noise floor. Well. You must choose a decoder instead of an amp. . Because the amp is to amplify the input audio. Including the noise floor. But most enthusiasts can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t hear the noise to the bottom. It''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s not that the player has no noise floor. And it''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s very small. You can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t hear it directly, after adding an amp. The amp will amplify all the sound input to the amp, how much will it amplify? 6.6 times! ! . Of course, the bottom noise has not been spared. and so. . After adding the amp, the bottom noise is heard. The first reaction is that the amp has a bottom noise. This is where everyone is more confused. Therefore, in the evaluation, we can see that many people say that there is noise. But some people say there is no noise. This is the source of the noise floor. of course. The bottom noise is divided into large and small. How to suppress the bottom noise well? ? ? U3 PLUS. On the basis of past timbre. Committed to the reduction of background noise and anti-interference, after many proofing comparisons, it has reached an ideal state. When using a mobile phone. It has greatly improved the noise floor of mobile phones and the interference problems caused by mobile phone signal radiation. When to use the amp? First of all you need to have an entry-level headset. In other words. . Original mobile phone earphones and earplugs within one hundred yuan. U3 PLUS or U3 MINI are not used. You can buy U1 amp to improve the sound quality. Because the U3 series of amps are already relatively high-end amps. Relative to the brand. There are already about 600 yuan in performance and quality. It''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s just that Brother Bird wants to benefit everyone''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s ears. For moving iron headphones. Individual earplugs are like IE80.UE900. Double-action coil earphones. Earplugs or headphones with a circle of iron have a significant improvement. Of course, there are also many earplugs with more than 300 yuan that can use the U3 series of amps, specifically in terms of sound. If the sound sounds dull. There are glitches at high frequencies. The sound is weak, and the U3 series of amps can be used to improve the sound quality at the back of the human voice. Many professional-level players have LO output. LO is the abbreviation of LINE OUT. That is, linear amplification. It is an interface dedicated to connecting amps. But most players or mobile phones do not have this interface, so can they not be connected to the amp? The answer is no, why? It''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s very simple. . In exaggeration. If you have a K701. Use your phone to push it. That''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s definitely impossible to push. Then the phone is paired with U3 PLUS. It will be a qualitative leap. Many people wonder why? Isn''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t there secondary amplification pollution? Ok. . Please don''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t be too loyal to the forum gods. Who knows how to use a mobile phone as a sound source? What do we want? What we want is that the sound is nice and comfortable. Why follow the routine. Listening to music is for your own listening comfort. Why bother to yourself again. Many people will also say. Brother Bird. Does your amp have sound stains? Sound dye? What is sound dyeing? I have unfortunate news for everyone. All sounds are colored. If there is no sound dyeing. Well. The sound of all devices will be the same. There is no tube amp. Pure Class A. Category A. . class. . Tired!

So what is a decoder?

Good question from this classmate! All devices that can emit sound have their own decoder. As small as the radio. Big to handjob! As long as it is a device that can emit sounds that human ears can hear. Each has its own decoding chip. Of course the sudden noise of the tractor doesn''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t count. That is to say, all the sounds that can be emitted by ordinary electronic devices have their own decoders. But why the radio that I bought for more than ten yuan is not as good as the sound of the radio software that comes with my phone? Well, let''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s not talk about it. You understand. . You get what you pay for. Because the decoding chip of the mobile phone is good. What can a good decoding chip bring? The result is a better sound. A quieter background. Better resolution. More details. Anyway, it''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s infinite, good! Of course, not all devices can use decoders. For example, a player with only 3.5 output cannot be connected to a decoder, and a mobile phone without OTG function cannot be connected. There is also the OTG function but the lower version of the system can not be connected. In short, the popularity of OTG audio data output has not been promoted very well. . correct. Speaking of which. Let me insert. . . . Don''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t be my bird brother. How to match it nicely. simply put. Everyone’s equipment is different. Even if it is the same. player. Amp. The headphones are all the same. . But everyone has their own preferences. Not that I like the sound. You will like it. For example, the special plane of Brother Bird is even Huawei. Even if Brother Bird doesn''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t like using Macs. This. . It makes sense.

The following is the all-in-one OTG decoding amp. Those who want to know first can take a look. Some knowledge about decoding amp integrated machine will be mentioned later.

Then it''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s about the mill! ! ! ! ! ! !

How to polish the amp? Simple gameplay for the masses. Change the op amp. Switch to the recording line.

First of all, a simple one. Switch to the recording line.

The recording line is currently divided into several basic line-based

Oxygen-free copper: The sound is full and warm. The flavor is pretty good. The sound density is also great. Disadvantages: The sound is mixed. The resolution is lower. Less details.

So when is oxygen-free copper used? It''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s just that the sound doesn''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t sound strong. thin. The sound has glitches. It sounds like there is no emotion, oxygen-free copper can be used when the water is boiled. and so. Now you can choose the oxygen-free copper wire of Brother Bird. . Hahahaha. . .

Brother Bird has made a set meal. But the package is for U3 PLUS. Because the sound requirements are slightly higher, you must choose a better amp. There is nothing wrong with this idea: wire knowledge can be applied to each amp. So here only take U3 PLUS as an example.

Click on the picture to make a purchase:

Silver-plated wire: The sound is colder. Resolution is high. The sound field is wide. Lots of details. Disadvantages: The sound is thin. The voice is bright. Fullness. Insufficient density

When is it used? The voice sounded dull. The sound field is narrow. The vocals fall behind. The resolution is not high enough. Not enough details. You can use this line

Single crystal copper: The sound is warm and full. There is charm. The sound field is wide. Lots of details. The voice is round and slender. In short. The shortcomings seem to be few. Nothing to fault

When can it be used? amount. I still recommend that you don''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t buy such an expensive line. Matched with this amp. Buy my higher-end amp and buy this cable. Otherwise, it will be top-heavy. Did not grasp the point. This is just for you to see. . What is more demanding HIFI

All right. The introduction of the wire is over. The following is an introduction to the op amp that I prefer to start with.

First of all, everyone must understand what an op amp is. The op amp is simply equivalent to the memory bar of the amp. So it is still more important. The op amp is divided into single op amp and dual op amp. This is the easiest thing for everyone to make mistakes. . A single op amp is not one. in contrast. Words used. It is necessary to use 2 at the same time. The dual op amp generally only needs to use one. . In fact, single and double refers to the core inside the op amp. simply put. Two single op amps form a dual op amp. To put it more simply, 2 single-core op amps form a dual-core op amp. So everyone will understand. But what everyone talks about now is whether this nucleus is true or false. Of course, Brother Bird was shot while lying down. After all, it affects the interests of peers selling op amps alone. Why didn''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t I compare the op amp to the CPU of a computer? ? ? Let me put it this way. Brother Bird is a high-end player. To put it bluntly. Through the circuit. Circuit design. The adjustment and feedback design of the capacitance resistance element. I can make an ordinary op amp with a few dollars to get the effect of tens of dollars or hundreds of dollars. So everyone must understand the point. . The point is not the op amp. . And it lies in the design of the circuit. The calculation and feedback design of the difference between the capacitor and the resistance.

well. Everyone already understands a lot. The op amp is introduced below. .

Forget it. . There are too many op amp models. I will not introduce them one by one. Hundreds of introductions are endless. . Even if the introduction is over. . I''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''m done too. I only focus on a few more cost-effective ones. Let us talk about the op amps that everyone can easily buy. . Let''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s not talk about it. Unbearable. . The rooster crowed all. Let’s go to bed if you have time!