I bought a new Bassman and 2x12 cabinet in 1965, 50 watts. I got it to replace my Supro bass amp which had two speakers, either tens or twelves. The Supro was about twenty watts and wasn't quite cutting it. I figured the Bassman would be plenty loud. We didn't mic the drums, and the quitar player ran through a Fender Champ or Princeton, probably five watts. For PA we had a Bogen mixer/amp running into two of those giant metal horns like you used to see at the old baseball stadiums. They were about twenty inches across at the big end. To "mellow them out" my sister made some covers with elastic around the edges that snapped over the front. Paisley and flower pattern, real psychedelic. My first suspicion of trouble came at band practice the day before out first big pay gig. I had to turn the Bassman up quite a bit to be heard. And sure enough, at the gig when I turned it up to try and match the volume of the five watt Fender guitar combo it farted heavily on any note on the "E" string. That really pissed me off because I picked beans all summer to pay for the stupid thing. The other half of the twin bill played all Paul Revere and the Raiders and The Animals. They ran through two Sears Silvertone piggyback stacks. One for bass and one for guitar and vocal. They really blew us out of the water. It seemed like they were ten times as loud as us with their Sears amps. The crowd went wild. Of course it wasn't just their loud volume. They had been growing their hair out longer than us and the lead singer actually had a little pony tail in back. I dragged that stupid Bassman amp home and a couple of weeks later I sold it to a guitar player. Bottom line, that thing barely was loud enough for a quiet band practice. Playing a live gig with a rock band it really sucked. I replaced it with custom made preamp going into a GE commercial tube power amp driving two 15" Altec Lansings. Problem solved.