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Old 27th March 2010, 07:13 PM   #1
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Default 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.
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Old 27th March 2010, 07:20 PM   #2
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I was thinking on building this one http://www.bas.plumts.com/technosema.pdf

What do you think about it?
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Old 27th March 2010, 07:36 PM   #3
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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.
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Last edited by apexaudio; 27th March 2010 at 07:39 PM.
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Old 27th March 2010, 07:46 PM   #4
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Ok I found it. I'll check the schematic
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Old 27th March 2010, 10:46 PM   #5
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Cemu to?!
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Old 27th March 2010, 10:48 PM   #6
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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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Old 27th March 2010, 10:49 PM   #7
danspy is offline danspy  Thailand
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No IRF but probable the shortest way to get 100W-R8.
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File Type: jpg mosfet100rt2.jpg (59.7 KB, 260 views)
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Old 27th March 2010, 10:51 PM   #8
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Quote:
Originally Posted by danspy View Post
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?
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Old 27th March 2010, 10:53 PM   #9
wahab is offline wahab  Algeria
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Quote:
Originally Posted by danspy View Post
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...
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Old 27th March 2010, 10:55 PM   #10
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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!
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