Dear Bugo, you got it quite right, sorry if I wasn´t clear enough, so, as "one image is worth 1000 words) here you get two. #1) is a hand-drawn schematic of my "breadmaker", my P100 module. I´ve built around 10000 of them, the first 9000 or so with 2N3055H+Tip31/32 drivers, which lately had to be replaced by Tip141/142 because nowadays it´s almost impossible to get a genuine 2N3055H. The current version uses IRFP250 which are close to indestructible. #2)Is a poor scan of the board "ready-to-mount": : the 100W/4 ohm amp is the center section, on the right is the +-42 power supply, and on the left are the +-15V preamp supply outputs. When I get my camera back I´ll post better pictures.
Dear Teemuk, thanks for clearing Bugo´s doubts.
The amp´s sensitivity is around 700 mV, it has mixed voltage and current feedback. Power output is 20 clean volts into 4 ohms and supports many "ooops!!! sorry!!!" shorts.