I’m also surprised that my 66 SB-12 can cop a modern sound with the treble boosted up and the bass played with a light and articulate style
This is my experience too, with the treble @ max, bass @ min, and volume around 10 o’clock. P-bass with Ampeg B-15 (1964). Mine was changed to 4 ohm by Jess Oliver.
Anyone know if that just means he reconnected different wires from the OT?