The best 1W amp with 6v5 1A, anyone?

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I would use a chip with Rail-toRail output.
Also you should use 4 Ohms or 2 Ohms speakers to get 1 Watt.
It is impossible if you use 8 Ohm.

To build a discrete is very difficult, if you want some 1 Watt output.
It is not impossible, but difficult.
 
How about TDA2822M, bridge config?
 

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To build a discrete is very difficult, if you want some 1 Watt output.
It is not impossible, but difficult.

I guess so. Actually I'm limited by the battery, not the watt. I think 0.5W is still loud enough.

Or is it difficult to get an acceptable distortion? From what I have seen using 2 or 3 stage simple transistors, distortion is above 3%. This is too high compared to a chip amp but I don't know soundwise because that is probably second order. Need to try one to know and compare.
 
How about TDA2822M, bridge config?

Ah, I have plenty of that chip. Yes I will build the bridge version for comparison to get to the best one. Problem was/is there is a difference between the sample schematic and sample PCB, on the feedback arrangement;

and I don't know about bridge amp so I have no idea which one is correct (but I think the schematic is correct). Couldn't find time to ask question about the PDF. Maybe later.
 
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