Thank you pelked for an excellent how-to. After reading all the glaring compliments, I thought I'd give this a try so I went to Best Buy to attempt to purchase capacitors today. They only had 300 Hz caps in stock. I figured I'd give them a try. Definitely removes too much bass and midrange. It wasn't unlistenable... but it wasn't a great deal more pleasant either. Definitely resulted in a perceived reduction in volume, even though I can now crank it up to 40 without causing muddiness. However, I have to also turn up the bass to like +7 to make it feel acceptably loud, which then causes the subs to sound a little funky.

I used the crimp on connectors so that I could switch them out easily when I get others. I'm going to order a few different frequencies to see which I like best. I figure I'll try the one that pelked suggested and then try some others, to be determined later. For now, they are back to stock and I wouldn't suggest cutting off at 300 Hz. lol.