i have my impreza hatchback. more of a mini wagon though. i wanted to know from somone with experience... i have done subs up ports back, subs back ports back and sealed boxes. but never subs up port(s) up... what do you think i should do for my next experimental build with 2 15" re se's ? i want to do 8.5 cubes tuned to 32 hertz... would subs up ports up be louder than 4 5" aero's faceing back. also if i do port(s) up should it be a slot port rather than aeros?