Building a box for two sa10"s that will be about 2.6cf net after subs and port. This is a long narrow box for the back of an xtra cab truck. My question is should I do one 6" aero or two 4". I have both but not sure which would work better Box is 43 x 11.75 x 14.5 and I'll be using a soundqubed 2200 for power at 1 ohm