Trouble finding box specs for 15" Mag

[T9X 0]

I've been searching all over here and CA.com for vented box specs for my Mag. I've tried using the box calculator at subwoofertools.com and I keep coming up with ~73in^3 of port area. From reading around it seems like I should be closer to the low-mid 60s. Am I correct or should I just stick with the plans swt.com is giving me?

[Electrodynamic 2]

70 in^2 is a bit excessive. You can actually stick to 50 in^2 and be just fine. Keep in mind that's a port that measures over 4" tall by 12" wide.

[T9X 0]

70 in^2 is a bit excessive. You can actually stick to 50 in^2 and be just fine. Keep in mind that's a port that measures over 4" tall by 12" wide.

I'm using a vented baffle enclosure rather than aeroports so that doesn't help me too much.

[Electrodynamic 2]

The measurements I supplied are for a vented baffle. For a vented baffle multiply vent width by height and you have square inches.