Can anybody explain to me FS aka Resonant Frequency

[splfanatic]

Greetings Mates ,

Its just a topic that i havent been clear abt yet and so want u to shed sum light on it

q1) what really is the FS

q2) what difference its being High or Low Make ( like a sub with fs29hz and other with 35hz)

q3) Do we have to coordinate the tuning of box with FS and does it make difference to the subs low frequency

capability?

Regards

[BeachJoshua]

[[email protected]]

Greetings Mates ,

Its just a topic that i havent been clear abt yet and so want u to shed sum light on it

q1) what really is the FS

q2) what difference its being High or Low Make ( like a sub with fs29hz and other with 35hz)

q3) Do we have to coordinate the tuning of box with FS and does it make difference to the subs low frequency

capability?

Regards

resonant frequency is the point where the subwoofers excursion, is at its max, and where it dosent lose any control. so in other words your bass wont get muddy or distorted, well theirs not a big difference between 29 and 35, but lets say 29 and 50 50 would probably most likely be for Burping Tones as 29 Might be for a daily driver, so tune the box to that tone and you'll be set, level the subsonic filter to just barely below that note, and you shouldn't ever blow your sub*

*unless running like 3x or 4x the rms power handling of the subwoofer, cranking the gain, or running more max power than it can handle.

hope this helped you out man

[splfanatic]

Thanx a bundle for the detailed reply, looking forward for more

There is common perception where i live that fs has to do with subs playing capability like a sub with 40hz fs is not meant for lows n stuff. I personally think its not right but i could be wrong

Looking forward to the magic reply that clears my mind totally

[[email protected]]

Thanx a bundle for the detailed reply, looking forward for more

There is common perception where i live that fs has to do with subs playing capability like a sub with 40hz fs is not meant for lows n stuff. I personally think its not right but i could be wrong

Looking forward to the magic reply that clears my mind totally

well if you tune it to 45 your subs going to freeair on 41 or lower probably, thats where you get into the hard calculatons, like Size is a big factor as well, you wouldn't have a 3 inch tall by 14 inches wide port for a 12, haha, as well as a 1 by 4 port for a 18. but once you get the balance you want, and the sound you want you'll be content. but i've built many subwoofer boxes and well even though im only 18 i've owned three vehicles two suvs and a sports car, haha and well it depends on your vehicle factors to the sports car and first suv flexed alot, but my latest one is solid, and holds SPL very well, which means im tuning my new sub box to around 33 hertz with a 3 inch port. and well just keep the FS close, and follow the manufactures instructions towards how many cubic inches of port area per foot in your box and you'll do fine man =]

Happy Camping!

[Neo_frog]

Fs is the driver free air resonance, in hertz. 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.

[Stephen]

http://techtv.mit.edu/videos/2964-breaking-glass-with-sound