cubic feet for 18btl i need help

[MIKE W 0]

iam building a box will 41 INCHES BY 21 INCHES BY 22 " be fine for the sub and how many cubic feet would that be thanks for any help !!

[KU40 173]

That would be 9.1 cubes before port and sub displacement (and bracing). So you should be ok. What port do you have in mind?

[MIKE W 0]

thats good to hear i was getting a lil scared i built it to big thanks man and the ports i will have two both at 21"by4" will that be ok u think?

[Kanaworm$ 292]

Width x depth x height / 1,728 = Cubic feet (internal volume)

You will need to subtract your speaker, port and internal bracing displacement.

[MIKE W 0]

thanks man good lookin!!