SA12 SPL Coil FS?

[timma100 10+ year member]

The stock coil is 33.96Hz, and my box is tuned for this coil (34Hz) Problem is my two SA12s have SPL coils, and the FS is quite a bit higher. But I don't know what it is.. I want to get new tune ports so I can dial it in and go deaf... If you have any ideas id be happy to hear it. Thanks a lot

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[SPLaudio 5,000+ posts]

dont worry tuning at 34hz with the spl coil it will be fine.

 

[Kangaroux 5,000+ posts]

Fs isn't really that relevant especially in a vehicle/enclosure. Those specs are measured free air, and once you place the sub in an enclosure all of that changes