box for btl 18"

[shippinglard 0]

im new to the forum and im building a box for a 18"btl and was wondering how this sounded.

33W x 22H x 24D

92^2 ins port area

6.241 ft3 of air space

im tight with room so hopefully this is a good setup.

thanks

[mjmarovi 8]

sounds great, what are you tuning it to? i could figure it out, but not sure if those dimensions are outside dimensions, in which thickness matters, or if that's inside usable airspace dimensions. i'm assuming those are outside dimensions, and the 6.24cuft is after port and displacement. even then, only way i can see those dimensions working with that amount of port area, ending up with 6.24cuft after port and displacement, means you must be tuning way low. by my calculations, a port with 92 sq in of area, for example, square port 10x9.2" would have to be 44 in long to take up enough space in the box assuming 1" thick walls, to end you at the 6.24cuft. this would tune your box ~28hz. which if anything, for going on the smaller side of recommended airspace, I would try tuning closer to 33-34hz.

now, if your box walls are 1.5" thick, than your design is probably pretty good. need some more info to really clarify though...

box wall thinkness? (1" thick MDF, 3/4", two sheets of 3/4", what did you use?)

are those dimensions from outside of box or inside?

square port? round port? port dimensions?

are you trying to hit as low as you can in space provided? what are goals? SPL? daily?