A few ignorant questions:
First, the scenario. I own a '93 Isuzu trooper. A year ago, seeking an upgrade for the stock speakers I purchased 2 Sony 3-way 6.5's and 2 Sony 3-way 5-1/4's. After some time one of the rear 5-1/4's went bad. The dude at Best Buy said it was because it was underpowered. They replaced them but I never installed them b/c I was afraid they would have similar problems. I recently bought a Polk Momo M12 (enclosed) on ebay and am thinking about powering it with a Rockford Fosgate 500s, 501s, 550s, or 551s--whichever I can get the best deal on. Is this a good idea? Also, it was suggested that I get a 4 channel amp with at least 400 watts continuous to power the 4 sony speakers already installed--is this the right line of thinking? Also, I recently spoke with a guy at a local car audio place and he said the dude at Best Buy was full of crap and further suggested that the problem with my rear speaker was that it had gotten more bass than it could handle. He also suggested that the deck would provide enough power for the 4 sony speakers. He granted that an amp would make them louder, but seeing as how I was under something of a budget, that it would be fine. He said I should buy a capacitor(s) to limit the bass going at least to the rear 5-1/4's and perhaps the 6.5's so that turning up the volume would only raise the mids and highs and the bass would only be affected on the Polk Momo sub. Basically I don't know if any of this stuff is true and I am looking for a cost conscious solution. Please advise. Thanks.