help me on tuning please

[350zspl 10+ year member]

exterior dimensions

30" width

18" depth

15" height

3/4" MDF

1.5" baffle

2 x 4" aero ports 12" in length

1 driver 15" dd 9515g

what would the tunning be?

thanks

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[y22kc]

Bassbox 6 pro says it would be 35hz or so. Depends on the wood being 3/4 in thick and displacement of the speaker