From my personal point of view. The only advantage of class D amplifier over class AB amplifier is the efficiency of power supply. PWM can make the utilization rate of power supply exceed 85% when the output voltage is maximum. Therefore, class D amplifier can show its advantages when using voltage above + -50v. Preferably + -50v or + - 70V. That is to say, the total voltage is between 100-140v.
If the voltage is very low. For example, +12v VPP. Then digital amplifiers have no advantages. Because class AB amplifier is easier to design and manufacture at low power than Class D amplifier. Simple. Lower cost. The playback effect is also better. For example, lm1875 of + -25v and TDA2030A of + - 18V.
Or tda2005 with + 18V. In terms of sound quality alone. Class AB is better than class D.
It has no PWM conversion process. No EMI electromagnetic radiation. No output inductor is required. The inductor will change the output sound.
I think many people are making tpa3116. I think it is a relatively high distortion. The voltage is very low. An amplifier with low power. I didn't find it useful. I think tda2005 can achieve better results. Cheaper cost. It is also easier to make. I will spare a little time.
About 20 minutes. Design data. Then upload it here. I expect that a total of one CPU radiator is enough for stereo. No fan is required. It can meet the BTL voltage of output + -15v.
The standard circuit adopts bootstrap boost capacitor
If the voltage is very low. For example, +12v VPP. Then digital amplifiers have no advantages. Because class AB amplifier is easier to design and manufacture at low power than Class D amplifier. Simple. Lower cost. The playback effect is also better. For example, lm1875 of + -25v and TDA2030A of + - 18V.
Or tda2005 with + 18V. In terms of sound quality alone. Class AB is better than class D.
It has no PWM conversion process. No EMI electromagnetic radiation. No output inductor is required. The inductor will change the output sound.
I think many people are making tpa3116. I think it is a relatively high distortion. The voltage is very low. An amplifier with low power. I didn't find it useful. I think tda2005 can achieve better results. Cheaper cost. It is also easier to make. I will spare a little time.
About 20 minutes. Design data. Then upload it here. I expect that a total of one CPU radiator is enough for stereo. No fan is required. It can meet the BTL voltage of output + -15v.
The standard circuit adopts bootstrap boost capacitor
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In fact, the distortion of TDA chip is lower than you think.
Including tda2005, tda2050 and TDA2030A.
I even think that the performance of all class D amplifiers in the world is far lower than that of TDA2030A.
Of course, I don't sell TDA2030A. But I have heard the voice of TDA2030A. Very good.
And its price is very cheap. About $0.20. And it's very simple. There is almost no heat.
It may be for these reasons. It is not recommended by merchants.
I'll be there for a while. Perform APSYS two measurement on tda2005.
Then publish the data. Tda3116 data will also be released.
You have to understand. Class D amplifier has a lot of distortion. From SMPS. Inductor. Various interference outside the chip. Make the music sound bad. It is even a lot backwards than the TDA2030A 30 years ago
of course. We can also use many class AB single power amplifiers.
For example, tda7850 thd0.01%-0.2%
But I don't think it's important. Can try. Because they are simple
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Power amplifier. Including speakers. In fact, there has been no real technological improvement in the past 50 years.
Everyone likes new products. Not a good product.
Therefore, businesses continue to change products. It's just that people like fresh things. Not something better.
Because analog amplifiers are difficult to improve. There are many active speakers including digital amplifiers in China. The price is within 20 dollars. It includes a 10-20 watt digital amplifier. 2 full frequency horns. About 3-4 inches. I've heard a lot. In fact, their effect is much worse than that of TDA2030A active speaker at the same price.
In fact, I also sell many digital amplifiers. It sells well. Why not make money.
It should be equipped on the car. Or cheap active USB sound.
But most digital power amplifiers with single power supply are industrial waste. These things can be used. But don't expect too much. It cannot exceed TDA2030A lm4766
But it doesn't matter. I don't want to change others' ideas.
I'm just saying what I think. Maybe it's wrong. After all, others pay for things. I don't pay for it myself.
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If you can listen to a audio system for half hour, then it is a good system. Don't care about specs, stereo or mono. At home most people listen to low volume only, distortion in many amps at low volume is not easy to hear. This is a DIY site. So do what you like to make and enjoy. Once you powerup the DIY amp and sound comes from even some cheap speakers you will be happy. To reach the ultimate quality is like the railway tracks. They appear to end somewhere but never ends The 12th E note that from the guitar, you think is so much separate, will not appear with another song. Regards.
I agree with you very much.
When a person has only one amplifier. So this amplifier is the best amplifier in the world for him.
I've only used almost all the amplifiers that others know. So I want to talk about what I know. Maybe it doesn't make sense to most people.
At least no one will agree with me in a short time. If most people agree with me. Then I won't say this on the Internet.
In fact, TDA2030A was a very excellent amplifier 30 years ago.
Even the United States took it as an example to ban exports. At least in China, it is impossible for ordinary people to buy TDA2030A. Later, the manufacturer mastered this technology. Start production. You should understand that as long as Chinese manufacturers produce something. This thing will become unprofitable. So the dealer will tell you that this thing is not good.
I believe many people should have heard of TDA2030A. It is no worse than lm3886.
For a lover. Something he uses himself. Is the best thing in the world.
I just used too many things. So nothing is the best.
Here, of course. Many people use 3116. This obviously makes people feel uncomfortable.
Few people in China will use this. Although these things are all made in China. This is the reality. You can consult your Chinese friends.
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Tda2040 is better than 2030.2050...i haven't tried it.
Best 2040 topology is balanced output and single rail.
Best 2040 topology is balanced output and single rail.
I think there's some kind of following of these ideas cause anything goes for the masses.I realized that after seeing a review of an amplifier I bought for pennies at the flea market.
The inside chip is class ab 8 watts .. tda7057, something like the ones you could see in the cheapest car stereos of the 90's .The guy reviewing it is amazed by its 1% thd... Maybe it's tweaked in the factory for heavy H2 ...i can't figure it right now but I won't even give it a try cause that means replacing some electrolitics...and I honestly can't do that for this amp.
Well i bought it to use the box with a tpa3116or ta2024...
I won't buy into these arguments because efficiency matters.I do like balanced tda2040 .I know their sound and it is pretty good but in the grand scheme of things 90% efficiency is a lot more than 50...60%.It runs cooler and needs less weight in the transformer cause why wouldn't you pair a class t or d amp with a classic transformer just smaller? In fact a lot of the reviewers I saw on youtube about tpa or ta chips sound used them with their cheapest wall wart unsync'd smps ...then claimed here's the sound of class d! If I sinc every smps with its pfc to get lower noise why wouldn't i consider that a mandatory task for class d audio in order to have a meaningful review?
That's not the kind of amps you really listen to when you're in analytical mood in your home theater.That's probably your kind of everyday sound you listen at work or in the car ...but tpa3116 is perfect for that task cause I can't imagine horn or vtp speakers at the workplace or in your car nor you dragging a 3 kg transformer to supply the damn thing cause it would be a sacrilege supplying tda2040 from smps but you don't say the same with class d amps after reviewing the hell out of their thd...isn't it?
Well i bought it to use the box with a tpa3116or ta2024...
I won't buy into these arguments because efficiency matters.I do like balanced tda2040 .I know their sound and it is pretty good but in the grand scheme of things 90% efficiency is a lot more than 50...60%.It runs cooler and needs less weight in the transformer cause why wouldn't you pair a class t or d amp with a classic transformer just smaller? In fact a lot of the reviewers I saw on youtube about tpa or ta chips sound used them with their cheapest wall wart unsync'd smps ...then claimed here's the sound of class d! If I sinc every smps with its pfc to get lower noise why wouldn't i consider that a mandatory task for class d audio in order to have a meaningful review?
That's not the kind of amps you really listen to when you're in analytical mood in your home theater.That's probably your kind of everyday sound you listen at work or in the car ...but tpa3116 is perfect for that task cause I can't imagine horn or vtp speakers at the workplace or in your car nor you dragging a 3 kg transformer to supply the damn thing cause it would be a sacrilege supplying tda2040 from smps but you don't say the same with class d amps after reviewing the hell out of their thd...isn't it?