High Power 20 kW???

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#5
audioPT said:
Hi!!!!🙂 🙂

I've been 😎

I've found the files of tha 20kW power amplifier.
As I said, please look at Glen's schematics.

Ragards to all those of U who request this.

Pedro Martins


-> The Voltage Amplifier here:
Click to expand...

IF you could hold the power supply stable at 260 Volts AND have insignificant losses in the power transistors, you could hit 1 KW/channel into 8 ohms. If everything was perfect, 4 KW into 8 ohms bridge mode, 8 KW into 4 ohms. So where does that 20 KW come from?

G²
 
#9
PhaseLockLoopy said:
is this RMS or "baseball hat worn sideways", car audio Watts? :mischiev:
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+/-130V? That's good for 1500 watts at 2 ohms with a practical power supply. Maybe 2kw if you went nuts on the biggest 10kVA toroid you could get. Either go class H or cascode on the output stage, at it could be made to work. The front end looks like it is well thought out.

For 20k watts, you'd have to go to a 1/4 ohm load - Hey, you could drive a line array with all the drivers in parallel.
 
#11
onto aban said:
20KW? What for? (for what?)?
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A 20KW audio amp would not be for a home HiFi system. But there are industrial uses. One might be an acoustical test chmber. There is one of those at work. Equipment that is designed to work in very, very noisy enviroments need to be tested at sound levels that might kill or injur a person.

I'm thinking of the electronics that control large rocket engines and he controls bult in jet engines. The sound of these engines can rip apart most "normal" electronics and theelectronic must be mounted directly to the engine.

So how to test? Get a BIG speaker and a 20K amp put the device under test directly in front of the speaker and ...

Soe of these test chambers are larger, one I know of can fit somethng the size of a school bus. It makes sense to test. Cargo inside the Space Shuttle cargo bay is subjected to very loud soud during llaunch and you need to simulate that. Needless to say you need a REALLY BIG amp to realistically simulate the sound of a space shutle launch
 
#12
But the input stage seems designed for music, but not really stable for professional audio use.
Oh.. I see..
Just car audio rated watts. That's reasonable. Yes. It is for big Trucks, Tractor and buldozer audio system I guess. Their engine sounds loud and strong.
+/-150V rails was used in pro amps long ago for 700W rated output.
 
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