Hi folks, I picked up a SG-812 powered PA head. 6 channel input with reverb, foot switch control for reverb, and 100 watt X 2 output. Very retro and heavy. This thing was built like a tank, it has been used so much, a lot of the paint on the control board that tells what each control does is worn off, but it still works great. Gibson was able to email me schematics but I would like more info like a brochure or owners manual. Any other owners of this unique beast please let me know. As well as these things are built, I can’t believe I’m the only person who has one of these.