How do you determine "fL / LFbleak pt" for full-range speakers?

[Chace]

Hello.
For full-range speakers, could you please tell me how to determine "fL / LFbleak pt" for "ESL_line_sectioned_DIY"?

For hybrid speakers, you can probably consider the woofer and slope, but what do you consider for full-range speakers?
If you make it too low, the output sound pressure will be reduced.

Thank you in advance.