we some know i have my 1st spl competition this sunday. rules state you can open doors or windows up or down. i know hearing wise my bass is lour to the ears when windows are about halfway down. can some1 tel me . will i get more db's with window s down a little or keep em shut . system is 2 audioque hdc3 15's , 1 aq 2200d xspower s3400 underhood.my car is 2004 trailblazer.also anythng else thts would help gain couple points