Okay so im going to buy a whole new system in a year or so but for the mean while i have 2 kicker CVT, a boss amplifier 1600 watts peak, a optima yellow top battery this is all in a 4 door F-150 2007 under the back seat except the batter, and i fell like its not loud, is there any way to improve, it i have the factory radio i dont know if that plays a factor i dont think so but if any body knows how to improve it please help me maby theres a way to port the box or something