What's up UG.

I have an Ibanez RG570 and the guy I bought it from customized it with a 9v preamp for a boost and added EQ. I really want nothing to do with this and would prefer a standard tone pot and passive setup. I brought it to this guy I know to see if he can remove all of it and he said all I would need is a new tone pot for it.

Is there a specific one I need to buy?

And I don't understand the whole 250k/500k thing. Will that matter?