Me and my band are thinking about buying one of these for our first PA. Has anyone ever used one before and can tell me their thoughts on it? Apparently the power button on it doesn't work on it, but the owner just uses a power surge plug thing to turn it on and off (could this be fixed? Could I do it myself, or should I take it into a shop?). He also said one side needs retubing, does anyone know what kind of tubes it takes? He wasn't sure and I can't really find much on Sunn equipment online especially the 1220S. It's only $100 though, so I figure it's a great deal for a 1200 watt PA head, even if I have to retube it, plus it will be split 4 ways, so I'm really only paying $25 for it.
Thanks for the help!