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Old 6th March 2011, 08:48 PM   #1
Joku is offline Joku  Finland
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Default Suggest me an amplifier schematic :)


A friend of mine is considering to make a DIY amp, with 100W output to 8 ohms and 200W to 4 ohms. It would be class AB and stereo, and it's probably going to be pushed occasionally.

First idea I got was to modify Rod Elliott's P3a to have two pairs of output transistors.. but any other ideas?
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Old 6th March 2011, 09:13 PM   #2
BrianVG is offline BrianVG  Belgium
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Does it need to be high sound quality?
The better the amp, the more it costs and more difficult to make.
Mosfets are more rugged and possibly easier and cheaper to get than P3a BJT's.
FET fanatic
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Old 6th March 2011, 09:17 PM   #3
Joku is offline Joku  Finland
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It should be high or at least decently so sound quality.. Price of BJTs isn't really an issue since On semi sends free samples (up to five pieces per type) just for the price of shipping.
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Old 7th March 2011, 10:02 AM   #4
Joku is offline Joku  Finland
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Any other ideas? There's a 2SK1058/2SJ162 schematic (and PCB) in a DIY book I have, so that could also be option..
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Old 7th March 2011, 10:10 AM   #5
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Leach Amp Plans - Part 1

or, if that's not enough power:

Leach SuperAmp Plans
The great audio capacitor myth : 'There's such a thing as too many PSU caps'.
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