100W/8Ohm working design needed

DigiSoft · 27th March 2010, 07:13 PM

Hi. I am looking for some good and tested 100W on 8 ohm design. That design should have maximum of 4 power transistors (2 pairs)

I prefer IRF.

Thank you.

PS: I know I should use search button and I was, but like already said the forum has too many example projects and I can't decide which is good and which not.

DigiSoft · 27th March 2010, 07:20 PM

I was thinking on building this one http://www.bas.plumts.com/technosema.pdf

What do you think about it?

apexaudio · 07:39 PM

If you realy want build 100w 8R amplifier with IRFP240/IRFP9240, in my thread " DC servo mosfet amplifier" is schematics and PCB layout for amplifier based on Harrison X1000. I made over 200 PCBs in last 10 years for service and building amps. I have long list caffe bars and discoteque's in Serbia and Montenegro were this amps still works.
Regards

DigiSoft · 27th March 2010, 07:46 PM

Ok I found it. I'll check the schematic

boraomega · 27th March 2010, 10:46 PM

@apexaudio
Cemu to?!

DigiSoft · 27th March 2010, 10:48 PM

@apexaudio
Sorry I don't really like it. I think I am going with SubZero or Blaster from Bora. I don't know which one I am confused.

danspy · 27th March 2010, 10:49 PM

No IRF but probable the shortest way to get 100W-R8.

DigiSoft · 27th March 2010, 10:51 PM

Quote:

Originally Posted by danspy

No IRF but probable the shortest way to get 100W-R8.

Mmmmmm I like this.
This is exactly what I was looking for. But aren't there to little components? What other say about this one?

wahab · 27th March 2010, 10:53 PM

Quote:

Originally Posted by danspy

No IRF but probable the shortest way to get 100W-R8.

This one doesn t work with IRFs, only
with the renesas 2sk1058/2sj162...
With IRF mosfets, distorsion will be awfull ,
as they need much more current drive capability...

boraomega · 27th March 2010, 10:55 PM

Very good generic design "danspy" but with that supply voltage only one output pair will have very hard time on 100W and certainly NO WAY to survive on 4 ohms!

27th March 2010, 07:13 PM	#1
DigiSoft diyAudio Member Join Date: Mar 2010	100W/8Ohm working design needed Hi. I am looking for some good and tested 100W on 8 ohm design. That design should have maximum of 4 power transistors (2 pairs) I prefer IRF. Thank you. PS: I know I should use search button and I was, but like already said the forum has too many example projects and I can't decide which is good and which not.

27th March 2010, 07:36 PM	#3
apexaudio diyAudio Member Join Date: Feb 2010 Location: Serbia	If you realy want build 100w 8R amplifier with IRFP240/IRFP9240, in my thread " DC servo mosfet amplifier" is schematics and PCB layout for amplifier based on Harrison X1000. I made over 200 PCBs in last 10 years for service and building amps. I have long list caffe bars and discoteque's in Serbia and Montenegro were this amps still works. Regards Last edited by apexaudio; 27th March 2010 at 07:39 PM.

27th March 2010, 10:46 PM	#5
boraomega diyAudio Member Join Date: May 2005 Location: Cacak, Serbia	@apexaudio Cemu to?! __________________ If you are arguing with an idiot, first make sure that he is not doing the same thing.

27th March 2010, 10:55 PM	#10
boraomega diyAudio Member Join Date: May 2005 Location: Cacak, Serbia	Very good generic design "danspy" but with that supply voltage only one output pair will have very hard time on 100W and certainly NO WAY to survive on 4 ohms! __________________ If you are arguing with an idiot, first make sure that he is not doing the same thing.

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27th March 2010, 07:20 PM	#2
DigiSoft diyAudio Member Join Date: Mar 2010	I was thinking on building this one http://www.bas.plumts.com/technosema.pdf What do you think about it?

27th March 2010, 07:46 PM	#4
DigiSoft diyAudio Member Join Date: Mar 2010	Ok I found it. I'll check the schematic

27th March 2010, 10:48 PM	#6
DigiSoft diyAudio Member Join Date: Mar 2010	@apexaudio Sorry I don't really like it. I think I am going with SubZero or Blaster from Bora. I don't know which one I am confused.

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