Eddie Havok
10+ year member
CarAudio.com Elite
looking to move to 2 18's, but only have 8 cubes to work with. name some 18" subs that work well in little space.
+1Sealed or ported?
FI Qs work from 4-8 sealed.
+2Why not find the subs that work best in the space you have rather than trying to squeeze in subs that would do better with more? I'd imagine a pair of 15's would work better with 8cu.