In 1968 I bought a brand spanking new Fender Bassman with it's twin 12 cabinet. It looked beautiful set up on stage. It sounded horrible. I suffered through the two gigs that weekend and returned it as soon as I could. The store, Dawson's in Runcorn Cheshire, had sold my Epiphone Constellation trade in but I left the Fender there anyway.
I put together a rig from a Marshall bent front 4x12 and a Leak TL50 Plus valve power amp I bought for five quid. I built a little single 12AX7 preamp for it and used it very successfully. Those KT88s sounded great! LOL