is it a bad idea to have two 12's and 2 8" subs? I was wondering how I could add more midbass to my current setup. the 12's are in ported boxes. I have 2 component sets up front that dont really handle alot of midbass (5 1/4 and 6 1/2).I also already have an amp installed (for the 6x9's) so I would just have to put the boxes for the 8" somewhere and wire it up... any suggestions or comments?