box tuning

[macsdad 10+ year member]

can a sub with an fs of 39 work in a box tuned at 32hz? if not, what is the lowest tuning that will work? needs to be smallish. sub is rf t2d412, car is 08 dodge caliber, amp is rf t1000bdcp @ 2ohms=1300wrms.

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[duanebro 10+ year member]

It will work, how well it will work is another question.

 

[macsdad 10+ year member]

explain?

 

[macsdad 10+ year member]

explain?

 

[CAT MAN 5,000+ posts]

its fine.

 

[05trailblazer 10+ year member]

its fine.

explain?

 

[fasfocus00 5,000+ posts]

from what I know of, speaker will easily play below FS but will peak closer to FS freq than tuning. here's and example SA-8s have a FS of 41 but are suppose to be able to play down to 30hz.

Fs Driver free air resonance, in Hz. This is the point at which driver impedance is maximum. "This parameter is the free-air resonant frequency of a speaker. Simply stated, it is the point at which the weight of the moving parts of the speaker becomes balanced with the force of the speaker suspension when in motion. If you've ever seen a piece of string start humming uncontrollably in the wind, you have seen the effect of reaching a resonant frequency. It is important to know this information so that you can prevent your enclosure from 'ringing'. With a loudspeaker, the mass of the moving parts, and the stiffness of the suspension (surround and spider) are the key elements that affect the resonant frequency. As a general rule of thumb, a lower Fs indicates a woofer that would be better for low-frequency reproduction than a woofer with a higher Fs. This is not always the case though, because other parameters affect the ultimate performance as well."

 

[macsdad 10+ year member]

alrighty then, thanx.

 

[duanebro 10+ year member]

If you want to see how different specs affect the speakers frequency response, try playing with WinISD.

 

[CAT MAN 5,000+ posts]

explain?

fs and box tuning are not to be grouped with each other. its easier just to say that than a long *** response. thats mobile enclosurs job lol

 

[RangerDangerV2 5,000+ posts]

remember that after a few hours of play time the fs of a driver can drop as much as 15%...

 

[CAT MAN 5,000+ posts]

remember that after a few hours of play time the fs of a driver can drop as much as 15%...

i would not say this is 100% accurate. some drivers are tested for specs after break in. some before.

 

[RangerDangerV2 5,000+ posts]

i would not say this is 100% accurate. some drivers are tested for specs after break in. some before.

I would say that it is true for pretty much all of the mainstream brands...