FAOW

The one and only
Joined 2001
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It's a slow day. Time for a little entertainment - a micro project!

Someone sent me a request for a simple 1 watt amplifier.

How could I resist?

My answer:

Assuming that your preamp can put out 2 volts (and it should),
a 1 watt design would be the easiest thing in the world.

Attached is an example.

I will put it up on the Pass Labs forum at diyaudio and see
what kind of suggestions it gets for construction and improvement.

Feel free to post questions.

"Zen Mod" will likely be the first to take the bait.


The following draws 1.5A off a 19V computer desktop supply and gets
1 watt into 8 ohms at about .5% THD.

:cheers:
 

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I would say…...why not the ACA instead of this?
The idle current is the same so efficiency much better in ACA amp?
So if heat generation is the same as the ACA......what is be benefit other than it is slightly more simple?
How does it sound?
 
1 watt for mighty drivers rated 3~5 watt's max
 

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Ok....but with 2V in it gives 2V out.....it is only 0.5W in 8 ohm?
So the preamp needs to put close to 3V out to have 1W in 8 ohm.
Therefor I concluded it had a little bit of voltage gain :)


I throw away a lot of germanium power transistors some years ago. They were paired in some small white boxes. Now I think I should have given them to somebody instead. If was before I thought I would get time for "DIY" audio.....