I just found out that the PSU-300FRN Alpine system is discontinued...but I was able to find a brand new one on Ebay.

Took me about 2.5 hours to install (I took my time as I didn't want any of the plastic bits to snap when removing the trim pieces).

After having it installed for a few days, I have to admit, I'm not that impressed with it. I've always had 500 watt mono amp powering a 10" shallow mount sub in all of my vehicles. That box would thump nicely and give you those earth shaking lows. This PSU-300FRN makes the stock speakers come to life and adds a better low end with the sub. If you're looking for something that you need to turn down because the bass is too powerful, this is not the right system for you. If you're looking to bring the crappy stock speakers to life and add a sprinkle of bass to the truck, this is for you. It's hard to say it was worth the $650+ for the alpine product. I'm going to explore adding a second PWES8 underneath the driver's seat and connecting using speaker level inputs.