So, last Sunday, I installed the capacitors I purchased from Crutchfield labeled as "bass blockers". Here's the story.
I purchased the Crutchfield version because they came pre wired and I wanted to make this as quick and painless as possible. But after receiving them, I realize they are pre wired for direct connection to the speaker, meaning I'd have to remove a lot more of my door than just the little access panel. So, I bought some bullet type crimp connectors and cut the pre wired ends off the capacitors and crimped on the new connectors and did the same to the red wire in the door panel. After testing to make sure sound was still coming out of my speakers, I then tested the new sound quality. I couldn't really tell a difference at first, but when listening to Kanye West's "Golddigger" I definitely noticed that there was less fuzz coming out of the woofers and I could feel the kick from the subs behind the seats. Definitely a better sound than before! I'm still experimenting with the bass level and I have it on -5 now. So far, so good. Too bad I didn't just go to Radio Shack and buy the capacitors by themselves and save myself the money, since I had to wire them myself anyway.