1000W amplifier -- This is great schematic

DigiSoft · 18th March 2010, 02:12 PM

I've found this schematic and I think it is awesome design. It is very popular project in Balkan region. The design is by boro.
What do you think about it?

AndrewT · 18th March 2010, 02:24 PM

1000W into 4r0 requires >89Vpk and >22Apk.
Do you think this amp connected to +-95V PSU can deliver that into a resistive load?
Have you any idea of the peak current demand of a reactive load?
Have you any idea what size of heatsink is required to keep this amp cool?
What precisely makes this design awesome

wg_ski · 18th March 2010, 02:28 PM

The only way for that (or any other amp using +/-95V) to put out 1000 watts is to either regulate the supply or run 2 ohm load with a practical one.

I'm sure the amp would *work*, with possibly minor modifications. Expect about 700W. The probelm with simulators is the "Vdc" element, that stays at 95V regardless of what kind of torture you put it through. Real ones aren't so well behaved.

DigiSoft · 02:45 PM

Well I think it might work because it is designed by trusted designer. Why do you think it wont output 1000W at 100V. Then what V is needed for 1000W.

You all people just talk about every design that it is not possible to deliver that amount of power but none of you showed some good REAL 1000W designs.

If 100V is little then why do we use transformers at all? Why don't we make power amplifier directly from the mains 240V just we will stabilize it using capacitors and diodes. LOL
I mean come on people... there are 5000W amplifiers. What voltage do they use? with your math they should use at least 400V supply.

poynton · 18th March 2010, 02:47 PM

Quote:

Originally Posted by DigiSoft

.....................

If 100V is little then why do we use transformers at all? Why don't we make power amplifier directly from the mains 240V just we will stabilize it using capacitors and diodes. ................

Because that would be incredibly stupid and dangerous !!!! Which is why even discussion of that topic is banned on the forum.

.

meanman1964 · 18th March 2010, 02:55 PM

Don't forget this amp is designed for PA

DigiSoft · 18th March 2010, 02:55 PM

Quote:

Originally Posted by poynton

Because that would be incredibly stupid and dangerous !!!! Which is why even discussion of that topic is banned on the forum.

.

Then how can I make 5000W amplifier?
I DON'T NEED IT I just want to make it so I can show it everywhere and I can boast around.

Zero Cool · 18th March 2010, 02:59 PM

Ok this is the 2nd schematic i have seen where there are 2 sets of driver transistors and the output bank is split into two sections. There has to be some problems with this type of design. each output section has to run slightly different. how do you balance the sections??

DigiSoft · 03:06 PM

Here 500W version of this one for 8Ohms.

Quote:

Ok this is the 2nd schematic i have seen where there are 2 sets of driver transistors and the output bank is split into two sections. There has to be some problems with this type of design. each output section has to run slightly different. how do you balance the sections??

This is something like parallel wiring. I think it is same if you put 2 in pair of those power transistors.

AUDISOUL · 18th March 2010, 03:12 PM

Hi DigiSoft,

I think you have also this pcb with that

18th March 2010, 02:24 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	1000W into 4r0 requires >89Vpk and >22Apk. Do you think this amp connected to +-95V PSU can deliver that into a resistive load? Have you any idea of the peak current demand of a reactive load? Have you any idea what size of heatsink is required to keep this amp cool? What precisely makes this design awesome __________________ regards Andrew T.

18th March 2010, 02:43 PM	#4
DigiSoft diyAudio Member Join Date: Mar 2010	Well I think it might work because it is designed by trusted designer. Why do you think it wont output 1000W at 100V. Then what V is needed for 1000W. You all people just talk about every design that it is not possible to deliver that amount of power but none of you showed some good REAL 1000W designs. If 100V is little then why do we use transformers at all? Why don't we make power amplifier directly from the mains 240V just we will stabilize it using capacitors and diodes. LOL I mean come on people... there are 5000W amplifiers. What voltage do they use? with your math they should use at least 400V supply. Last edited by DigiSoft; 18th March 2010 at 02:45 PM.

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18th March 2010, 02:28 PM	#3
wg_ski diyAudio Member Join Date: Oct 2007	The only way for that (or any other amp using +/-95V) to put out 1000 watts is to either regulate the supply or run 2 ohm load with a practical one. I'm sure the amp would work, with possibly minor modifications. Expect about 700W. The probelm with simulators is the "Vdc" element, that stays at 95V regardless of what kind of torture you put it through. Real ones aren't so well behaved.

18th March 2010, 02:55 PM	#6
meanman1964 diyAudio Member Join Date: Oct 2006 Location: Belgium the land of chocolate	Don't forget this amp is designed for PA

18th March 2010, 02:59 PM	#8
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	Ok this is the 2nd schematic i have seen where there are 2 sets of driver transistors and the output bank is split into two sections. There has to be some problems with this type of design. each output section has to run slightly different. how do you balance the sections??

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