How much mdf??

[gadgeteer123 21]

How much mdf would i need to build a sealed 3 cubic foot enclosure for my 15" xcon

[shakes 2]

1 sheet will be more than plenty.

[gadgeteer123 21]

1 sheet of 4'x8'??

[Mark LaFountain 1,054]

1 sheet of 4'x8'??

yes

[Kanaworm$ 292]

1 sheet will be more than plenty

[gadgeteer123 21]

ok thank you. How do i cut a perfect circle, i do not have a tool that does this??

[Impious 1,476]

Router with a circle jig is what you need to make a perfect circle.

If you don't have those, use a Jigsaw and a steady hand. That's what I did for years...