This is a 1970's SG SYSTEMS SG100 bass amp.
IT DOESN'T WORK.
It powers on, but the fuse immediately trips when the amp is taken off of standby. I opened it up to see if there were any visibly fried components, but I didn't see any obvious damage. It does look like the amp has been worked on at some point in the past, as you can see some visible writing on the board, in black... read more
At least 5 Reverb results for SG Systems tube amplifiers
At least 5 eBay results for SG Systems tube amplifiers