Anybody know where the stock 6disc non-Infinity radio has the front cross over set? From the other posts I've searched it looks like they split the front tweeter-woofer speakers at the head unit? If that is correct, does anyone know where?

I want to replace the front factory 6.5" speakers before Or-Fab cage goes in and need to know what frequency repsonse to shop for. Thanks for any help you can provide.