My current setup: 4 JL Audio speakers (Two TR650-CXi Coaxials, Two TR400-CXi Coaxials) Sony Deck 50x4 Two 10" Alpine SWE-1042 subs One MTX 300XD Mono Amp powering both subs Problem: Subwoofer volume contained within the cab of the truck, and the speakers aren't really loud. Just loud. I know of two faults, the subwoofer boxes are sealed and 6 years old. Secondly, I think the subs are underpowered considering I want it insanely loud (so you can actually hear the subs thump outside the truck). My budget is $250 dollars. Would you consider another MTX 300XD amp so each sub gets its own amp, or a huge 1000W amp to power both subs and ditch the MTX 300XD? Is the Sony deck sufficient for all 4 JL Audio mids? I am for sure getting ported boxes. The subs and amp is mounted underneath the bench seat in the back.