In article ,
Ian Stirling wrote:
You'd be talking about a very weedy amp if a wall wart would power it.

You can get surprisingly powerfull SMPS wall-warts.
The biggest I remember off-hand is around 30W.

The key is to run the transformer at a really high frequency, so you can
fit more power through.

You've still got the problem of the reservoir caps though - these need to
be a decent size for adequate 'music power' ;-)

--
*The more I learn about women, the more I love my car

Dave Plowman London SW 12
RIP Acorn