Join Date: Aug 2009
Location: Gaithersburg, MD
I'm not sure if the Monsoon amp has built in filters or not, so can't really answer your first question.
However, I have component speakers in mine (Alpines) with aftermarket amp. I put the crossovers in under the dash and then ran wires from there in to the doors and up to the A-pillars. The tweeters I installed in the stock locations. With a couple of notches in the tweeter frame, I got them to clip in to the stock pillar mounts just like the factory ones.
Even if you use components+Monsoon it might be easy enough to split the crossover inputs yourself and wire to the amp separately for bass/mid and tweeters.
Owner of "Campbelle", a Brazen 2008 GXP ... with mods piling up...