As subwoofers break in how are t/s parameters affected

[Eugenics 5,000+ posts]

guess it was already explained. and dont worry, i'm math retarded as well.

 

[JohnEJanowitz 10+ year member]

How much Cms changes is really a matter of what materials were used in the driver, mainly the spider and how much phenolic resin is used. You can have two different traditional methods to get the same stiffness on a spider. One would be a cloth nearly the stiffness you desire with only a small amount of phenolic. The other would be a softer cloth with more phenolic. The first option would have much more long term stability. Foam surrounds do loosen up a little as well as rubber surrounds on the first initial stretch out of the mold, but not nearly as much as a spider. In general though you should never have a result where Cms should change more than about 10% with breakin.

John

 

[vehementSPL 10+ year member]

And thanks. Speaker dependent of course.. But does anybody know typically how much(percentage) the CMS goes up from initial play to broken in. (just use a stiffer sub for example).

 

[sundownz Pro Seller]

And thanks. Speaker dependent of course.. But does anybody know typically how much(percentage) the CMS goes up from initial play to broken in. (just use a stiffer sub for example).

John answered above, it shouldn't be much more than 10% difference.

This may vary more for extremely stiff subs since a few mm/N is a larger % change. But again, it's not likely to shift 200 - 400% as you were hoping for in the other thread.

 

[vehementSPL 10+ year member]

ha ha a guy can hope can't he lol