The Concert Amp had been updated, so it was a player, not a museum piece. It was made to use. The replacement drivers in it were (still valued, I believe) Mojotone versions of the P10Q, necessary caps and other relevant components were replaced, etc. It actually sounded great with my Rickenbackers at "home" volume levels when jamming with friends, and was amazing sounding when I ran it through one of my custom LDS cabinets, the largest being a 2-12 +6.5 mid driver cabinet Don built for me. It had a pair of Eminence 3012LF drivers and an 18Sound mid. ungodly bottom end on those old Fenders, even my old early '70s Princeton Reverb Amp sounded great into that same LDS cabinet, just didn't get as loud, but loud enough to gig with.
