I have installed a P2 Rockford Sub in my Cadillac trunk with a slot port box. Of course i have deep loud bass but no tightness or SQ. If i install a sealed box with another P2 and attach it to the side, will i then get the best of both worlds with SQ form one and loud from the other. I do not have alot of money and am buying it in pieces, Also what amp as i need a new one would run this set-up well. I am currently running a PPI 4-channel, but am looking for a Rockford Amp for when i get the new sub next week, ANY and all help PLEASE