Volume plus at least one tone control. More tone controls may or may not be useful, depending on the design. Not all EQs circuits sound the same, so I would never say I need 2 bands or 3 bands.
I once owned a Pedulla with a Bartolini preamp that was parametric. I hated it and just switched it off.
I once owned a Pedulla with a Bartolini preamp that was parametric. I hated it and just switched it off.