Can u run one 12 in 2 12 box and remove blown one?

[jmfrb1]

And I'm over here trying to fit a 15 in my hatch without taking up too much space lol

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[Jeffdachef 5,000+ posts]

That's still 7 cubes.
Is this box sealed or ported? And as others have asked, are there two separate chambers or is it one big one?

It sounds like a proper efficient ported box around 2.25 to 2.5 cubes each after displacement with double baffle etc.. Nothing too big at all.