Resonance frequency help

 

Bronze Member
Username: Slickmanarino

Post Number: 23
Registered: Sep-06
how can i find the resonant freq. for a 91 caddy sedan deville with a wall, shouldn't i tune my box to that freq.
 

Gold Member
Username: Theelfkeeper

Stockbridge, GA USA

Post Number: 2891
Registered: Feb-05
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.
 

Bronze Member
Username: Slickmanarino

Post Number: 25
Registered: Sep-06
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.
 

Gold Member
Username: Dustin3

Tigard, OR U.S.

Post Number: 3416
Registered: Oct-05
you have 2 mojo subs and 4 l7's??
 

Bronze Member
Username: Slickmanarino

Post Number: 27
Registered: Sep-06
no 2 mojo amps 2400 rms and 4 15L7's
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