Help with sealed enclosure volume

[Biker 10+ year member]

I have an MTX Thunderform enclosure for 2 10" MTX speakers specs as follows.

Dimensions: 81⁄4"H x 571⁄2"W x 181⁄2"D

Weight: 50 lbs.

Power Handling: 450 Watts RMS

Subwoofer: Two 10" Thunder4500

Amplifier: 200 Watt Class D

(on amplifi ed models only)

Enclosure Volume: 1.8 cubic foot, sealed

Impedance: 4 Ohm

The specs on the speakers are as follows

Sealed enclosure net volume .75cubed

question's

would you think the enclosure volume stated above 1.8 cubic foot, sealed is the volume for the entire enclosure with both subs?

Is the sealed thunderform enclosure closed between the 2 ten inch speakers or do the speakers share the same airspace?

and finally, if I wanted to make the enclosure smaller sealed volume what should I put in there. There is what looks like foam in there currently?

Thanks Biker

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[Biker 10+ year member]

Bump?

Please guys I really need this info for my build tomorrow. I know I tend to drag posts out but this really should be a simple couple questions to answer.