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trujap
07-21-2003, 10:00 PM
anyone know the resosant frequency for a dakota? if not how do you calculate this? any exactly what resosant frequency mean /

havoc06
07-22-2003, 12:02 AM
is it ext or reg cab? Res freq is the frequency that will be the loudest in your car providing your installation is correct. You would figure this out with test tones and a meter. I dont know for sure, but it is somewhere between 45-58 Htz. Its different for every car so you have to figure it out yourself really... :crazy:

trujap
07-22-2003, 02:23 PM
its ext cab. I thought there was a calculation using the sub box and the dash or something?

havoc06
07-22-2003, 10:03 PM
nah, not that ive heard of...have to use a meter

Randy Savage
07-22-2003, 10:09 PM
There is a formula....but it is not accurate :)

If you want a rough estimate, take a sealed box, a meter, and some tones, and run them, record all the tones, and draw up a graph. Then take the sealed box, put it outside, and run the tones and record what frequencies meter at what...keep the meter the same distance from the woofer in both tests.

Then, after the graphs for each are drawn up, find the point at which the 2 graphs are farthest apart, and that should give you an idea of where your res. freq. is...

Loyd (Bigbassman) did some testing, and found that higher sound levels show different resonant frequencies...

ngsm13
07-22-2003, 11:55 PM
There is a formula....but it is not accurate :)

If you want a rough estimate, take a sealed box, a meter, and some tones, and run them, record all the tones, and draw up a graph. Then take the sealed box, put it outside, and run the tones and record what frequencies meter at what...keep the meter the same distance from the woofer in both tests.

Then, after the graphs for each are drawn up, find the point at which the 2 graphs are farthest apart, and that should give you an idea of where your res. freq. is...

Loyd (Bigbassman) did some testing, and found that higher sound levels show different resonant frequencies...

that confused the **** outte me! lol,...i am very interested in this b/c i am going to build a sealed box and get some time on the meter soon. peace

NG

Bobyota
07-23-2003, 05:32 PM
Loyd (Bigbassman) did some testing, and found that higher sound levels show different resonant frequencies...

This may be kinda related. I play bass guitar and in the same room and in the same spot, I could change volume and get different resonant frequencies. I was told by many that the speaker cabinet I had was about the best out there for I believe what you would call transient response. Well it seemed to favor different notes/frequncies at different volumes :banghead:

bumpin_blazer
07-24-2003, 01:57 PM
There is a formula....but it is not accurate :)

If you want a rough estimate, take a sealed box, a meter, and some tones, and run them, record all the tones, and draw up a graph. Then take the sealed box, put it outside, and run the tones and record what frequencies meter at what...keep the meter the same distance from the woofer in both tests.

Then, after the graphs for each are drawn up, find the point at which the 2 graphs are farthest apart, and that should give you an idea of where your res. freq. is...

Loyd (Bigbassman) did some testing, and found that higher sound levels show different resonant frequencies...

yeah i remember reading that on SIN a while back crazy stuff right there. anyway do what john said if you want to and have that much time. if you don't, i would just guess it around 45hz. build a box at 42hz and burp it around 45-48 simple as that. unless your a SERIOUS die hard competitor the res. freq. of your car typically won't be a huge factor if your off by 1-3hz.

adam