I say this every time this is brought up. Rip out that crappy Monsoon stuff! It'* all paper junk with flimsy foam surrounds. Take it all out, get a decent head unit, some nice door/deck speakers, and a good amp for all of them. You'll lose a little bit of low end because your deck speakers are no longer "subs", but you'll gain a ton of mid and high. Then, if you REALLY want that low end you can either get a nice 10" sub and tuck it in a corner or you can build a box around the backside of your deck speakers.
2004 Chevy Silverado Z71 - 15% tint, FTDRL, All-on-high, 5000k lows/fogs, tinted tails, color matched grille, Sound by Kenwood.