jove

i just passed on a jl audio w7 13.7 for 2 fi audio 15 btl's... i have a 2004 grand prix and i want know if i can put both of them in the trunk or will it sound better if i go with just one with a large box... i want to get loud and low, and be heard from very far away, what size should i make my box to get the best sound out of this speaker and what size should my port be???