I brought home a buddies 1967 Super that he hasn't played in a few years because it didn't sound good at all. It was thin and weak sounding with a lot of noise/bad distortion against the notes. I didn't know a lot about his history with it. Got it home, poked around a little and noticed V3 felt loose. I tightened up the sockets and the noise / distortion went away but it's still quiet. I sit right next to it turned up to 6. It sounds OK actually and the reverb and vibrato sound good, it's just quiet. Replaced all the tubes w known good ones. Nada I stick a bias probe in with #1 power tube and read 2ma. 2. So I pulled the chassis the other night to do a visual. It's got new electrolytics in 2008, whoever did it wrote down dates, including filter and bias caps. The V3 tube socket looks like it's a replacement. The bias pot is about in the center of its range. That's all the time I had and I've been too busy the last couple days to go back into it, but it's been on my mind. Called buddy and got the story. He bought it sounding terribly in 2008 and took it to a random tech. Tech put in some tubes he had laying around and did the cap job. Amp sounded great for a handful of outdoor gigs, then sounded like I 1st heard it when he showed up for a rehearsal. Out of frustration it's been sitting in his garage since. My thought is to check the plate voltage, look for cold solder joints, and work my way back down the bias circuit. Experience tells me it's usually something simple you should've checked at the outset, so I'm hear asking what I've overlooked. Anybody have any experience with this they're willing to share?