sunn concert

I have a 1970s Sunn Concert amp that hasn't been powered up in a couple of decades. It was suggested that I have a technician bring up the power using a variac to make sure the capacitors are still good or at least not fry anything too badly. I have tried to find a repair shop but have struck...

I have some old equipment from when I played keyboards in the 70s (Rhodes Mark I Stage 88) but want to pick up the bass. I was just going to use the amp (Sunn Concert) and speakers (Sunn 215S with EV cones) to minimize my costs. They are in great shape and have been sitting in my closet for...