The old factory speakers in my Jeep were sounding terrible. I mean so bad that even audio-books had become no fun to listen to anymore. At first I thought it was just a bad recording and the Jeep is after all, a rather noisy vehicle. But it was getting very difficult to make out the words.
One day I took screwdriver in hand and pulled a speaker out from the dashboard. Ah ha! The foam surround was all torn around the edges. Yup! That really sounds terrible. 
After extensive research, reading customer reviews, & shopping around, I decided to buy Polk Audio speakers for front & back of my Jeep. Jeeps are one of the few applications for a 4×6 speaker, but those are available, even if most will need an adapter bracket to fit a Jeep dashboard. The Polk db461p front speakers I chose are “plate” which does not mean there is a thick metal plate backing, but there is a thick plastic plate which is fine. 
I selected 5 1/4″ polk db521 which fit perfectly in the roll bar.
Crutchfield has a pretty good deal, and also important, they include everything you need to do the install easily. That means special adapter brackets, screws, and wires with the Chrysler factory connectors on one end, and the regular speaker connectors on the other end. As easy as it gets!
But the Polk Audio speakers I selected (suitable for marine use) came to $189 total. After hours of searching, I was able to find them a little cheaper elsewhere, but without all the extras that will make the install go easily & quickly. Given the choice, I’d rather not invent an adapter bracket, nor buy from an unknown online store. As I was going through all the motions of buying these on the Crutchfield website – to see what tax & shipping would be (zero and zero), a box for entering a coupon code appeared. Hmmm! …
After some banging around I discovered that my Discover card has some reward dollars built up, and it’s possible to really leverage that by spending the Discover Card rewards on Crutchfield gift certificates. Actually those gift certs are really just long numbers, but they work and you can spend them immediately. DiscoverCard sells the $50 gift certs for $40 of rewards $ (That’s $10 discount on each), and the $25’s for $20. I bought 3 of the $50 gift certificates and one $25 gift cert at the DiscoverCard website. I used all 4 on a single Crutchfield order ($175 in gift certs) saving $35 off my order in the process. Remember these discount gift certificates were bought with DiscoverRewards, not my cash. I had to add just $15 of “real money” to complete the order. What a win!!
So I got the speakers I wanted, from the store I wanted to buy from, including all the adapter brackets, and easy plug in wire adapters, saved $35, spent $175 of Discover Card rewards that I got for free, and only spent $15 out of pocket! :-) Now that’s smart shopping!!! And I am Happy about it! 
Epilogue:
I received the speakers in a few days. The install went really easily. About 10 minutes*. 6 screws for each front speaker, and 4 for each rear speaker. The adapter brackets for the front were essential. The back (roll bar) speakers popped in without any trouble at all. Perfect fit. Crutchfield included the wire adapters so there was no soldering, no twisting & no taping of wires – just plug ’em in. E.A.S.Y. ! :-)
*About the only difficulty I had – and it was no big deal really, was that the adapter brackets came with sheet metal screws which were just a hair too big for the holes drilled in the bracket. It was very hard to screw them in to attach the speaker to the bracket. The really scary part of this is that I was afraid that while I was torquing so hard on the screwdriver, It would slip & ruin my new speaks. augh! So I removed the screws I had already screwed in, took the speakers off the brackets, and marked which bracket holes matched the speaker screw holes. I left the speakers in the house (where they would be safe from slipped screwdrivers) and put the adapter bracket in the shop vise. There it was easy to apply more twisting force to the screws and pre-run them through their holes. No problem. Hooray for tools. Ok, now they fit, and will screw in more easily. No so risky anymore. Whew! Ok, so then I assembled the speakers to the brackets, and then everything dropped into place for that 10 minute installation I told you about.
How do I like these speakers?
Well there is no doubt that they are far superior to the old torn factory speakers they replaced. No doubt at all. They are also far better then the factory speakers were when they were new. I am now enjoying listing to my car stereo again, and I hear a lot more “stuff” in the mix than I used to. Music is fun again, and spoken words are clearly understandable. So it is really worth it. I should have replaced these things a long time ago. These speakers have good sound. Some people will say that no 5″ speaker can produce great bass, so they recommend a sub-woofer. I’m sure that for them, that is true. For me, with old factory speakers as my frame of reference, these new speakers do have bass, and more than I am used to. The highs & mids are clear as well. When I turn up the volume it sounds better if I turn off the “loudness” button, which makes sense. But if you’re expecting a lot of bass, you may want to add a subwoofer. And did I mention that I am happy with them? I did? Oh good.
If you are in the market for car stereo, speakers, home audio gear, GPS, or anything similar, definitely check out the Crutchfield website. They are good and make things as easy as possible. And here is a coupon code for you to save $20 off your Crutchfield order (if over $200). pszad-16hiy-d2suj You’re welcome! Don’t forget to use the discounted gift certificate trick if you can.
If you don’t already have a rewards card such as a DiscoverCard you are missing out on FREE MONEY. (Just make sure to pay it in full monthly, or you’ll lose any advantage).