Thank you. Unfortunately I can’t order the pots from Ernie Ball ((I live in Europe- they ship only to Usa). Is this pot the one to look for? Do you suggest any brand?Welcome to the Forum.
The SUB passive preamp uses a 500k Ohm pot for all three controls (Volume. Treble and Bass). Volume and Treble are audio taper. Bass is linear taper (but audio is probably ok).