Hello,
I have recently develop this LM3886 PA100 power amplifier it does use DC servo and the amplifier boards can also be suited
with a cliping indicator vertical board, in this thread I show this combo of a stereo system which include everything displayed
all capacitors are from Nippon and the price for this set is 110€
If you are interested in just in one of the products you can check here the power amp boards or the supply:
https://www.ebay.de/usr/rocksandsound
Or just reach me through here.