RSS315HF-4 dayton reference sub

If you are that concerned about changes in t/s values, then you want the values for YOUR driver, not a broken in driver from somewhere else.

Otherwise use the PE specs. They are accurate w/i production variations for the RS / RSS series and change in proportion during break-in. That is, your modeled response won't be significantly different.

I just got this nice 12" subwoofer. Parts Express advises that the t/s parameters listed are for a new driver. Has anyone tested a broken sample of this speaker?