Box design help.

[Nocturnus]

This is what I came up with. This being I think the biggest I'd want to go.

[Cashdollar2009]

Ahh I see. Well if you are dead set on 15"s you may need to look into adding more power to compensate for the lack of box volume. Obviously not ideal, but if you can't be talked into 12"s, that's the route i'd go. I'd just hate to see you have to cram a pair of 15"s into a small box where 12"s could potentially give you more output.

[Nocturnus]

Ok, lets say I want to do 12's ported. What would be the smallest box to get away with for a pair? Still L3 subs, same power.

[Cj Kumz]

Two 12s in a proper box will beat two 15s in a crammed box. 2.5-3.5 cubes for 2 12s will do.

[Cj Kumz]

This is what I came up with. This being I think the biggest I'd want to go.

Your port area per cube is under recommended. You might experience port noise

[Nocturnus]

Two 12s in a proper box will beat two 15s in a crammed box. 2.5-3.5 cubes for 2 12s will do.

Cool.

How do I know if my port volume is good?

I'll mess around a bit more with that software after I wake up

[Cj Kumz]

Here is a suggestion:

I don't know your sub displacement so I just guessed lol

[Nocturnus]

im too tired to think.

[Cj Kumz]

Looks ok so far. And yes you can put 90 degree bends to compensate for the length, just make sure there no sharp corners to hinder smooth flow.

Only issue is I am not sure how those subs will perform in a box twice there recommended size (1.25 vs 2.5 per sub) especially that you using close to rated power.

[Nocturnus]

I still need to mess around with everything. Little change in box size changes everything.