Hi buddies 🙂 Im from macedonia and im new on this forum 😛 If i do something wrong please tell me on time 😉 And of course i need scheme for 400w mosfet amplifier 🙂 ...
Take a look here :::Borina Amaterska Svastara::: the Legend stage master is a good one.
I also have one but send me private mail for that
I also have one but send me private mail for that
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Thanks to two colleagues but i realise that scheme from meanman1964 is better and much easier 🙂 ... But can somebody tell me 3 things ???
1. Does this scheme surely works ?
2. What transformer i need to get the full power from this amplifier ?
3. How much maximum real power can i get from this amplifier (RMS) ?
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It will provide your 400W RMS into 8 ohms but you will need a lot of FETs and a LARGE heatsink - it will get HOT.
For 95V supplies you would need a transformer with 70V AC secondaries.. it would have to be large, 1000VA at least. You would need a lot of power supply capacitance also.
These amps are not simple, cheap or safe to DIY - you really must know what you are doing - the power supply voltages alone can kill you
For 95V supplies you would need a transformer with 70V AC secondaries.. it would have to be large, 1000VA at least. You would need a lot of power supply capacitance also.
These amps are not simple, cheap or safe to DIY - you really must know what you are doing - the power supply voltages alone can kill you
If you don't know how to arrive at these answers then I suggest this is not a project for you at your current level of expertise.
Agreed. Class AB is not really suitable for these power levels anyway. Class G/H is not simple to build either. If you really require this sort of power level, you are far better buying a commercially made amplifier. If you buy a second hand one in good working order, it will be cheaper than anything you can DIY.
Almost every commercial amp will be cheaper and maybe even better than DIY.
The less experienced someone is the more likely he is interested in multi hundred Watt or kilowatt designs. (Looking at myself... 😉 )
Why is class AB not suitable for 400W? I built a class AB amp with twice the power. As a side effect you have a great heater, good for the winter months. Your cat might love it. 🙂
DIY is for learning something and for the fun of doing it. Not for saving money.
The less experienced someone is the more likely he is interested in multi hundred Watt or kilowatt designs. (Looking at myself... 😉 )
Why is class AB not suitable for 400W? I built a class AB amp with twice the power. As a side effect you have a great heater, good for the winter months. Your cat might love it. 🙂
DIY is for learning something and for the fun of doing it. Not for saving money.
Many people want to DIY such powerful amps because they think it will somehow be cheaper. It isnt.
800W in Class AB? It's ridiculously inefficient. If you really need 800W, you should be looking at Class D.
Exactly.
It is. 😀 😀 😀 Stereo idle power waste is 360W or something. 
Honestly, who needs 800W at all? Or 400W? This is for PA use. One can get a PA amp from 300 Euro.
However, DIY is for the fun of building something. Why not build a 400W or 800W amp yourself...?
If Daniel is serious about this project and he has already built a 100W+100W amplifier then he should already know the answers to his questions.
If he learned nothing from his first build, then I am not going to guide him through the route of potentially killing himself or others.
If he learned nothing from his first build, then I am not going to guide him through the route of potentially killing himself or others.
Im serious Andrewt , and im asking because you are older than me and you have more experience 🙂 And regards 🙂
Anybody with other scheme 😀 ?
Anybody with other scheme 😀 ?
I don't have one but I have a schematic for a Studiomaster MOSFET 1000. If that will help let me know and I will scan it for you.
Again if you actually need this amount of power, you should look for some better more efficient speakers.
I've built a 2x200 watt amplifier but that was just for fun, not because i needed one.
I've built a 2x200 watt amplifier but that was just for fun, not because i needed one.
One simple way to build a high power amp is to use a lme49810 driver chip.
So you can focus on the output stage.
http://www.diyaudio.com/forums/chip-amps/102973-lme49810-new-cousin-lm4702.html
So you can focus on the output stage.
http://www.diyaudio.com/forums/chip-amps/102973-lme49810-new-cousin-lm4702.html
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