I had to do a lot of work on this head; replaced the Filter caps, cathode bypass caps, bias cap, bias resistor, screen grid resistors, grid stopper resistors and the removed the death cap. Repalace the power tubes, phase invertor tube, all 3 preamp tubes. Even had to replace a bunch of plate load resistors as they had drifted out of spec and gone noisy. I put in a new Hammond mains transformer that runs on UK voltage.

But, oh boy, it was worth it! The normal channel on these AB165 circuit Bassmen breaks up pretty quickly, on 3 or 4, with a low growl. Open it up and it roars like a lion! Stupendous amp!

Note that if you pair this with one of our 2x12 blackface Bassman cabs you will get a 10% discount for the pair.