Good day gentlemen, i plan to build a sub for my saloon set up. Already have a pair of three way towers with 10" woofers that goes around 40Hz deep, but as you all know every extra Hz down there is wellcome. I have a mint condition KENWOOD KFC-W2510 laying around, crossover and more than enough amp. I've been countless hours playing with WINISD, and researching, but i cannot decide the basics of the build. My goal is to get some extra low end from 40 Hz down. HOW LOW DO YOU THINK I CAN GO WITH THIS DRIVER? any suggestion for the tunning frequency?