i have a little more info this time, this is my system: an avic d3, 4 6: door speakers, a pockrord fosgale punch p400-4 powering a 10" jl woofer in a poabox which sits snugly under my back seat. i have already changed out my 10" three times within the last year. this last time there was so much smoke i thought it was on fire. how can i fix this problem?