2 type r custom enclosure

i am build a ported enclosure for 2 type rs and there is a picture of the design will the direction of the back of the two speakers create a isobaric setup, should a put a board between the two i made the box size by adding the size requred for one ported box together creating a 3.4 cubic ft box with 3" by 9" ports any suggestions would be helpful

Definately put a divider in the box to separate the 2 chambers, especially if you blow one in the future the other can still play.2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

No, that's not isobaric.My ex once told me I have a perfect face for radio.