is 62 Hz to high for a cars Res Freq. ????

[i3abyjay25 10+ year member]

for a civic... does 62 Hz sound to high for a cars Res. Freq??

Click to read more...

 

[ss3079 5,000+ posts]

Doesnt sound high to me...

- Steve

 

[i3abyjay25 10+ year member]

ok.. then thats about what my civics Res Freq is.. jus everys usually tunes their box for alot lower.. so i thought a car Freq would prob be lower....

 

[B&R Innovation2 10+ year member]

I dont think too many people realy understandd the concept anyways

You'll prob tune around 4hz lower...depending on your boxes curve

 

[bumpin_blazer 5,000+ posts]

Originally posted by i3abyjay25 ok.. then thats about what my civics Res Freq is.. jus everys usually tunes their box for alot lower.. so i thought a car Freq would prob be lower....

how do you figure out the res. freq. of a car??

adam

 

[Mark_ab 5,000+ posts]

Originally posted by bumpin_blazer how do you figure out the res. freq. of a car??

 

adam

Accurately? With test tones and a meter.

 

[i3abyjay25 10+ year member]

Originally posted by bumpin_blazer how do you figure out the res. freq. of a car??

 

adam

the way i did mine today was i played a bunch of sine waves w/ my volume turn down to about half way...and i have the epic 150 meter in my car... and between 62 to 65 the meter was the loudest...

 

[B&R Innovation2 10+ year member]

as he said accuratly

Using a sealed box makes the job much easier if you must tune by ear.

I'll just use the MECP guide def.

A objects have a natural tendency to vibrate at certain frequencies. A crystal wineglass when tapped will vibrate air to produce a tone somewhere between 2khz and 6khz. If you were to play a tone at the same frequency that the glass produces, the glass would begin to vibrate on its own. Thi sis known as sympathetic vibration and is caused by the natural resonance of the object.

To obtain max SPL tuning a box that peaks at a cars RF will allow a sig gain at the meter. As 3abyjay25 pointed out his RF was quite high and thus the box he would make to peak at this freq would be almost unuseable for daily driving.

On to your question...

You use a test CD (laptop if you have one...creating set frequencyies)

Listen at a comfortable volume as you raise the frequency the car will begin to react...when you hit the sweet spot it will basically raise hell. Now imagine a ported box tuned to peak right at that number. It'd be pretty crazy

 

[Matador 10+ year member]

so then u would tune ur box at a frequency similar to ur reson. freq one, n that would be the loudest it would get?

 

[bumpin_blazer 5,000+ posts]

Originally posted by Matador so then u would tune ur box at a frequency similar to ur reson. freq one, n that would be the loudest it would get?

actually you tune it about 5hz lower and that way your peak freq. that you burp at for comps is your res. freq. yeah i've tested mine doing the sine wave thing and always came around track # somethin. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif kinda ***** i lost the jacket to my Bass test Cd that has specific frequency notes from 18hz to 80hz.

adam