this is the question i have asked b4; i have 4 10 inch ev's that i use for voice and mids and i have 4 6 inch beymas in the door right now.and for bass i have 4 jl audio 12inch w6v2 subs in sealed boxes- ok here is the question- ijust recently bought the new buick rendezvous truck and i have this system in it now but it doesnt seem loud outside the car when the htch is closed. but once i open the hatch its like a block party- but what would be the best way for me to build a box so i wiil be heard for blocks when the hatch is closed. if anyone knows or can help on what to do please help i have them in a box now -like a board right next to the back window but its not loud outside-- so im clueless ty for the help