Hi
Thanks for the info.....i have Slone's book " The Audiophole's Project Sourcebook"....but i don't think i can post it up here because it is copyrighted.....sorry

.....on second thought i think someone has put one  on the diy audio for fanatics......just do a search on Optimos........iam just trying not to break any ones rules.
I think the limiter-LDR type gain reducer would be best because it could be set for a gain level at the input of the power amplifier,that won't let overdrive happen.....iam no amplifier GURU.....but do you know where i can find a simple LDR/DIY circuit......THANKS SO MUCH

Hi Teemuk

Is this Vox circuit the whole power amplifier,or just the input stage of thepower amplifier? also if it is just input can it be use with any any amplifier? will this circuit add noise to the amplifier output

Hi All

Iam looking to find out about diy solid state guitar power amplifiers that when driven pass their SOA will clip soft instead of the nasty ss clipping. I know there are some HI-FI units that use limiter-circuits at the input of the power amplifiers , that are preset to reduce the gain, once it pass a set input voltage(anyone have a simple schematic for one?),but iam looking for something like the Randy Slone Optimos . This Optimos power amplifier has a vas stage that is dynamically bias,that is it has drivers for the output mosfets that once they are overloaded will operate in their knee, non-linear area(iam not a amplifier Guru......i just try to play guitar)
and send this output to the output mosfets, henc......soft-clipping.

Hi iS that a mosfet power amplifier your talking about?
Dusk