If we don't consider the cost.
Then why don't we make lm4702 and LME49810.
IRAUDAMP5 ,IRAUDAMP7S
They have lower distortion. Greater power. 100-500W 8R
Thd is very low. 0.0003-0.005%
In addition, you need to understand. Chip index is not equal to circuit board index.
Generally, circuit board indicators such as iraudamp7s are indicators of actual use.
Ma12070 is made by different people. The index is lower than the chip data. Unless it is Infineon demo version.
Therefore, ma12070 is applicable. It is not a home hifi sound.
And it is more suitable for. Mobile audio. Or car stereo.
I believe that ma12070 will be found on electric vehicles in the future
It should be a good experience.
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I give up. You haven't even heard the chip. You design something half and say you are not motivated. Then you take other chips into account. It is not all datasheet parameters that determine the sound quality. Experiments with cheap throw away devices show there is more in the chip than the devices offer because of previously mentioned reasons which I will not repeat again.
Sorry we don't seem to be able to communicate and understand eachother correctly.
Sorry we don't seem to be able to communicate and understand eachother correctly.
You mean if you listen to the sound.
Will it sound better than lm4702, LME49810 or iraudamp7s?
Its thd index is even worse. Less power. Use cheap 0603 capacitors.
Output inductor with low power and high resistance. And use laptop power.
I don't know why it sounds better?
I have been using iraudamp7s now. It's very good. Although the details are still a little worse than high-end analog amplifiers.
Maybe you are right.
I'll listen to it. Because it's only a matter of time. I will produce it.😛
Then compare it. I have an lm4702bta+ tta1943 5200x4
There is also an iraudamp7s. I often listen to these two machines.
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Ar least 3 times I pointed out that caps could be 1210 size X7R 50V or film. They seem to be key factor for better performance.
Film input caps (direct inprovement over ceramic caps), onboard linear regulator, good output filtering etc. It seems making things cheap is deep in your system as no one asks you to make it cheap.
Your own board has the small inferior caps so what do you want to express?
Film input caps (direct inprovement over ceramic caps), onboard linear regulator, good output filtering etc. It seems making things cheap is deep in your system as no one asks you to make it cheap.
Your own board has the small inferior caps so what do you want to express?
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Capacitance is just one aspect of what I said.
Because I found that most sales versions are like this. I know that any capacitor can be used.
For example, 400vmkp capacitor. Metal film resistors can also be used.
But I often see these components in other amplifiers. Ma12070 may not be able to see these components.
I didn't say ma12070 was bad.
It's just not that good. At least in terms of power. Distortion. It's not very good.
If it is used without dual power supply. Such as mobile audio. Cars.
It really fits.
But home hifi. It is not appropriate. As you once said.
We only need one amplifier. And use for 20-50 years.
Home hifi power amplifier is not fast food.
We can't replace it often.
This has turned into the dog chasing his tale 
Would have been a neat project to give a try as you envisioned it J-P.
“Home hifi power amplifier is not fast food. We can't replace it often.”
I must be like Mcdonalds then, I change amps once a month 🤣
Would have been a neat project to give a try as you envisioned it J-P.
“Home hifi power amplifier is not fast food. We can't replace it often.”
I must be like Mcdonalds then, I change amps once a month 🤣
Ma12070 is a good chip.This has turned into the dog chasing his tale
Would have been a neat project to give a try as you envisioned it J-P.
“Home hifi power amplifier is not fast food. We can't replace it often.”
I must be like Mcdonalds then, I change amps once a month 🤣
Especially in automobiles. Or mobile audio.
But please don't say it's the best amplifier. Whether distortion thd, power. Or current output capability. More than 10 years ago, the irs2092s or analog lm4702 was many times better than it.
But ma12070 may be cheaper.
The performance of audio equipment cannot be judged by the production time.
Because the audio device itself is an analog device. Like a watch.
We cannot say that any watch in 2022 must be better than that in 1990.
But businessmen will say that the products sold now are better than before.
I'm just an amateur DIY businessman😎
As businessman you must know the importance of making a difference with your product.
Just copying the reference design of MA12070 makes no difference. The hole world does it.
Your product gets value by adding something special. By adding input transformer, better output filter and maybe some better capacitors ( Jean-Paul )you can make a difference. If this diyaudio community supports you with it. You can create a great product.
And my best sounding amp( FU13 SE tube amp 20 Watt)has very bad specs. Forget specs and just listen.
Just copying the reference design of MA12070 makes no difference. The hole world does it.
Your product gets value by adding something special. By adding input transformer, better output filter and maybe some better capacitors ( Jean-Paul )you can make a difference. If this diyaudio community supports you with it. You can create a great product.
And my best sounding amp( FU13 SE tube amp 20 Watt)has very bad specs. Forget specs and just listen.
If I would have some time!
I like this chip.
With some additions, like FE, corrections regarding type of coupling/filtering caps and other thing, could be a nice module.
PS: it´s absolute wrong to say 0603 or 0805 ceramic caps are bad, or would died rapidely. Sure, I don´t know where you´re buying crap.
Deux centimes,
JP
I like this chip.
With some additions, like FE, corrections regarding type of coupling/filtering caps and other thing, could be a nice module.
PS: it´s absolute wrong to say 0603 or 0805 ceramic caps are bad, or would died rapidely. Sure, I don´t know where you´re buying crap.
Deux centimes,
JP
I think these are all amplifiers. Not too bad. After all, this is 2022. Not 1962.
We are only doing multiple-choice questions, not making comparisons. I think ma12070 is also good. It is suitable for single power supply. Such as cars. Mobile audio.
Because there is no way to provide dual power supply.
But household can provide dual power supply. In fact, I prefer to use transformers.
Not psu Because our company produces household appliances PSU. More than 200 are repaired every day. I don't like it very much. I prefer transformers. Although it is heavy. But its power will not be false. And I've never seen anything damaged. I estimate it can be used for a hundred years.
If a dual voltage transformer is used. Then there will be many options for home hifi power amplifier.
If you like simple and cheap, you can consider lm4766t,
If you don't care about the price, you can use lm4702.
Or my mx50se, l20se. They are cheap and have excellent performance.
I don't recommend class A, it doesn't make sense.
If you must use class D. The scheme of irs2092s + irfi4019 can be considered. Many businesses sell this solution very cheaply. Great power, excellent performance.
I think ma12070 can also be used.
If you happen to have only one laptop power supply and don't want to spend any money.
But I need to point out that it's not what someone said. It is the best amplifier.
I have never mentioned any amplifier I designed.
It is the best amplifier. This is too exaggerated.
I feel sorry. Because I have used a lot of 06030805 capacitors.
There is a lot of damage. If you are interested, you can follow my l20se amplifier link.
Many people are damaged because of 106 ceramic capacitors. Finally, I changed the capacitor. 50V 10uF BP electrolytic capacitor is used. Let me have a lot of trouble.
Many people are asking this question.
https://www.diyaudio.com/community/threads/l20-amp-use-only-two-njw0302g.199093/page-6
The brands of failed capacitors I bought are
YAGEO TDK
At present, only cog of the ceramic capacitor I use has no problem.
But it is small capacity.
In fact, I know that many capacitor manufacturers will have better quality.
But we can buy capacitors in China. There are many problems.
I still suggest you use irs2092
Use + - 50 or + - 60V voltage. Design a best amplifier.
150-200W 8R, 200-350W 4R
All dip components are used. Metal resistor. MKP input capacitance.
Just like（ arc ds225.） I will be more interested.
And I can design PCB to upload data publicly. I believe in ordinary DIY.
As long as there is a soldering iron, it can be assembled.
Actually, I can understand you.
90% of things in the world are right. But we can't choose too much.
We are doing a Single choice question. So that 89% of things can be ignored.
This is only a reality.
I am from the perspective of users. As a businessman, of course, you can make all of them.
No you don't. First you are the business man. I am the guy that thinks this IC is worth making a well designed amplifier with. You make a mediocre design that is incomplete. So your design is probably not better than any other cheap ready made amplifier. The goal as set beforehand is not reached.
That is about it.
That is about it.
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Then you can design a good one. Then make it public.
I hope to see your design. Then I can measure it.
See if it's good.