i have a a 15" mtx tr75 dual 2 ohm in a ported box tuned to 28 hz with a RF 501bd mono amp and was wondering what i could do to make it sound better. i have a pioneer AVH-P4200DVD and it slams like it is already. ive been wondering if a crossover, sound processor, or eq would help make it a cleaner sound and maybe hit a little harder. i have a budget of about $100 and would like to get the best i can for the money. any help would be appreciated.