I bought a cheap used Crown Powerline 1 off of ebay. There was no pic, and a limited description, but I bought it anyway. It's beat and a little rusty, but it works. It has RCA ins. Does this mean that it was designed for studio monitoring? If it was, can I still use it in performance applications? I've played guitar and bass through it at home, and they sound fine and get pretty loud. I was thinking about trying it as a stage-monitor amp for my band. If it was designed to power studio monitors, are regular monitors (Carvins) in the same efficiency ballpark? Will I still get the full wattage into them? Thanks!