Not about the FOCUS

This isnt really about my focus but, it is going in my focus. Im trying to find a single sub doesnt matter what size. But can stand up to or beat 3 solo barrix L5 15's(if i spelled that right).

Thanks

im not sure i understand your question. If your asking if you can fit 3 15's in there, anything is possible but why not just 2 12's?

i think its asking for a brand of sub, but im confused.