Search on here, there is thread that shows which color wires correspond with what. Or just take your door panels off and look at the speaker wires. They are the same color in the back coming out of your amp. If you want to make sure you have the correct pair, hook in a 9v battery and see which speaker pops.

And I have a Alpine PDX V9. It's pricey, but it is tiny and puts out 100x4 and 500x1. In my e46 M3 I ran all four channels to one set of Boston Pro 60's, 100 watts to the woofer and 100 watts to the tweeter. And then 500w to a JL 8W7. Used the old Dynavin (D99). Sounded amazing.