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ameuba10 20th March 2013 09:56 PM

DIY Stereo Amp 15-50wpc
Im looking for either a kit or a schematic of a nice stereo, 15-50wpc (could be more) amp. I have access to many components, as well as tubes and transformers. Are there any well known schematics that are worth the time and effort to put together? The only part i need to source would be the enclosure. Thanks!

boywonder 20th March 2013 10:04 PM

Well, the sky is the limit....there are lots of great projects here.

A few questions to help narrow down things......

What do you have for output tubes and output transformers? Are your output transformers PP or SE?

What is the sensitivity of your speakers?

ameuba10 20th March 2013 10:26 PM

I have many tubes here. 12ax7, el34, 6l6, and 6v6. I cant recall the exact power and output transformers, but there is a local guitar amp company that i can score them from. The speakers will be made by me as well. Estimated efficiency is 92-94db. Heres the link to the exact design.

Speaker Design Works

roline 20th March 2013 10:53 PM

I would recommend a 6L6 PP amp with 12AU7 LTP driven by a 12AX7 or 12AU7. Use plate to Grid feedback on the 6L6 AKA Schade feedback and 6.6KRaa outputs 30 watts with minimal GNFB.

ameuba10 20th March 2013 10:55 PM

Is there a schematic for that somewhere? I can follow it, just not create it

DF96 20th March 2013 11:09 PM

Does the guitar amp company make hi-fi transformers too?

ameuba10 21st March 2013 12:28 AM

They dont make transformers, they have a supplier i believe

jasondace2b 21st March 2013 12:35 AM


Originally Posted by ameuba10 (
Is there a schematic for that somewhere? I can follow it, just not create it

You can use the back end of a mcintosh ma230. just google it.

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