I understand the way capacitors work, allowing only only certain frequenicies to pass through them etc. I have seen anywhere from .22mfd to .80mfd on basses, so my question is: Does anyone know the actual frequency that is being allowed to pass through depending on the cap? For instance if you use a .50 cap for your passive tone control, what are the frequencies that are passing through? Etc. Etc. Or which ones are being cut? Is there some sort of formula for it? thank you.