Hey so i finally made the upgrade on my subs since i put the car away for winter. Im upgrading to 5 10" D4 re SEX sub woofers, and i am going to be running 2500 watts, my current amp (Alpine mrp-m2000) as well as a alpine mrp-m500... i just ordered the subs, so hopefully i will get them this weekend and finish the install. i have already built the box, just need to cut the baffle boards holes as i am going to carpet the box. I took a lot of advice from my other box builds and have made same MAJOR improvements. I will be purchasing a battery, but that will happen more near Christmas time. the box is tuned at 34.5 hz, and its 6.26 cubes. with a square port.purt is trunk firing and plexi is on the side facing my interior