I have a Crown Vic with (2) 15" L5 powered by a Sundown SAZ-1500D in a ported Super Bass Probox I have a Kenwood KDC-X794 Headunit. I have it wired down to 1ohm but I am kinda new to installs. I have black to black and red to red on the speaker then red to pos and black to neg on the amp but just using 2 of the 4 neg and pos connecters on the amp. I have my gains half way up. But I have to turn the bass knob all the way up to max and put the sub level on + 9 and the volume on 30 to get some good eardrum vibrating bass. Wassup with that???