Kenwood excelon x304 help sub crossover setting

[Bhay71]

I have a new system in my car.

3-sa8 aero port box tuned 33hz

sundown sfb 2000

kenwood x304

and on my kenwood app to set subwoofer lpf crossover should i set it at through or at 80 hz or what?im new with stereo equipment and trying to get this right.

i set my sub sonic on amp at 30 and low pass at 80 with test tone and dmm.

Thanks