one can never quite be sure that the mark has been hit. Each revision/exploration leaves new stuff to explore.

I suppose the one which got my attention was the 1619 version of the stereo amp. So-so OPTx's and moderattely overbuilt PS. I knew I was on to something. So sure that I made the investment in the better ooutput Iron for that amp. then it's on to a rev. here and a tweak there...

it's not perfect, but it will keep me happy until I figure a way to get a more powerful version of it toghther.

As to power, I figure that ~200-250W is a reasonable liimit. Stuff gets too big and parasitics start being more and more troublesome. There is a limit to what can actually be put through a given x-section of Iron ( W/in^2 has a Hi-Fi limit ).

And with efficient speakers, I ought to be able to live with something like a hundred W.
regards,
Douglas