I urge you to contact the service dept. of Accuphase. I have installed many simple capacitor and other parts upgrades but I always contact the service techs for their advice. Often they know a bit more about their stuff than you can figure out for yourself.
How many of you upgrade your preamps and amps?
I was just wondering how many people have upgraded their equipment by a non factory tech. I have recently upgraded some older equipment with very good results. I also presently have a Accuphase P300 amp that will have the electrolytics replaced with black gates and Mundorf M-Lytic caps installed. With the higher cost of great sound...it seems to be a excellent way to go.