you should tune slightly lower. i take it your looking for peak SPL for the car?? i've always heard you just need to get a sub, put it in a sealed box and find the loudest frequency. and that should be close to your res frequency...although i've never done this before so cannot say if it works...
theres a little more involved in box design if you are serious about SPL competitions though.
this is my lay out: Pioneer Premier 860 Alpine V12 345 Diamond Audio D6 5 1/4 components Diamond Audio D6 6 1/2 components Kicker 4 06s15L7d2 Memphis Audio 2 mojo's stinger 290 amp alt stinger dry cell deep cycle die hard gold under hood
1/0 guage wire w/upgraded factory wiring to 1/0
I have a 12 cu ft wall now it is tuned at 36 hz but someone here told me to basicaly cut both of my ports depth down by half which would put me at 45 hz. the loudest i tested in db drag was 146.7db and with what i have i know it should be a lot louder at least over 150. when i compete i use testone 45, and 46 hz. tell me what you think of this port idea
please give me any info you may have i'd greatly appreciate it.