Double check me please :)

[reclessantics 10+ year member]

Designing a box for 2 FI Q 18's. shooting for close to 10 cubes per sub.

box internal dims - 48 x 36 x 24 = 24^3 ft

Port area - 48 x 8 = 384^2 in

Port Vol - 48 x 8 x 14.82 = 3.3^3 ft

Left with 20.7 cubes net?

sub displacement - .24 per sub = .48

so - 20.22^3 ft left for bracing and wires/ ect.

Box is 10 cubes ish per sub, tuned to 28 hz.

does that sound/ look right? or did i overlook somthing?

thanks

kyle

(first ported box btw)

dont be too harsh lol

Click to read more...

 

[4OZGLOVES 10+ year member]

10 cubes is pretty big per sub.

How much power are you gonna run to each

 

[k_schutte 10+ year member]

I could be wrong but I think 8ft^3 per sub is more like what you want...

 

[reclessantics 10+ year member]

im putting 2 FI q 18's on an SAZ 2000d.

yeah 10 cubes is a shitton. but i was just going off what the FI website recommends. I was trying to see what the biggest box i could fit, and work my way down if needed. But the recommended vol per sub, is 6-10 cubes tuned to 28hz.

What would the difference be (pros/cons) of the different sizes boxes? (smaller/ larger)?

 

[reclessantics 10+ year member]

and as i keep designing it, i see that it will end up being smaller then 10 cubes. bracing will take up a little more space.

btw, i was going to uses 2x4's as bracing. is that a terrible idea sound wise? other wise that would be an ok way to take up some more space. and the 2x4's are going to be butted up against the front wall (sub wall) probably not stretching across the middle of the box.

 

[reclessantics 10+ year member]

How much power are you gonna run to each

around 1k each sub