Can anyone give me sond help ? Im planning on makeing a box for one Rl-i8 in a chevy colorado crew cab i want to make this box vented but want to get the air space and frequency perfect to get the most output so that i can compete. I am currently running one 12" RE XXX in a 2 cube box tuned at 28 hertz. all comment will help thanks

You're moving from a XXX to a little 8"? Try Blaubox or WinISD.

to much box the box for the 12 taks up my entire back seat yea the sound it nice but i do have more than two friends

try .6 cu.ft @ 39hz with around 600rms and put your subsonic filter

thanks for the advice