Jon Soderberg of Vintage Amp Repair used to work for Threshold back in the day and still works on repairing and upgrading Threshold, Forte, and other brands of amps. He does excellent work. He replaced the power supply caps and the bias pots on my Forte amp. There was a substantial improvement overall. Here is what I want to tell you. Given the age of your Yamaha M-2 (nice amp by the way) you also want the tech to replace the bias pots with the newer superior enclosed bias pots. Better to do it now while you are replacing caps.
Expectations after re cap of power-amp
My 1982 Yamaha M-2 power amp is in the shop and this time I agreed
to replace all the suspect capacitors. Two
of the capacitors are the size of coffee cans and the total bill may exceed
$500. I am told that since all the
replacement parts will be as good as or better than the original parts it should
sound as good as new or better.
I’ve never done this before. Should I expect “as good as new” or am I completely wasting my money?