Originally Posted by bpo118
I have been doing the same thing, upgrading the base system over the past month. Started with Polk db651s in the sound bar with polyfill stuffed in there. That was an okay at best improvement. Next I just installed Polk db6501 in the front with the tweeters and poly fill in the speaker boxes. This was a huge improvement. The tweeters helped a lot and the woofers gave a little bass, hopefully a little more with the amp I will be getting. Last I will be installing an alpine power pack amp to wake up these new speakers. By looking on amazon and ebay I will be spending less than 300 on everything.
I added exactly the same speakers you did. I'm pretty happy with them, the db6501s in the front are quite a difference maker and I had the "premium" sound. I also added a Kicker Hideaway under the passenger seat and run both subs now, huge difference in performance.
I was going to get the alpine power pack as well, but the premium system came with a 4 Chanel amp so I just used that one.