Box question

[J2phat4u 9]

I have 4 FI BL 12's and was wondering how many cubes net should I build an enclosure for them? Also how low should I tune to do hair tricks? They will be seeing a little over 6,000 watts of power.

[EPerez 236]

I'd do 2.5 cubes per 12 tuned to like 28 hz if you want hair tricks!

[trod2902 26]

Id say do more around 2 cubes per sub, with ~ 40 sq inches of port area per sub also. So ~8 cubes net with ~160 square inches of port. Tune it between 30-35 hz and you'll be moving massive amounts of air.
I gained output and bandwith when i went from 2.5 cubes to 2 cubes. 

[J2phat4u 9]

Ok so I should do two separate ports in a common chamber right?

[pmureika 31]

No 1 port for the whole chamber.The port for each sub x2 for your common port.

Edited April 18, 2013 by pmureika

[J2phat4u 9]

I have the single port down the middle now and it seems like the 2 subs close to the port opening are just moving and not really producing sound.

[pmureika 31]

The subs should be as far away from the port as possible.

[EPerez 236]

Can you put it to the side then? You should have at least 190 in2 port area. That's for 30hz.

[J2phat4u 9]

Yes I can put the subs closer to the middle and then have the ports on the edges?? The way it is now 2 of the subs sit right at the port opening.

[J2phat4u 9]

I just put a picture up on my profile of the current enclosure

[EPerez 236]

I would put all 4 subs on one side and have the port on the other.

[J2phat4u 9]

Ok I am going to try that and see how it works. With the power I have and 4 of those subs if I tune down to 30hz and have the correct airspace it should make me dizzy

[J2phat4u 9]

The guy that's helping me with the enclosure is loading all 4 subs close to the center and putting dual ports on the edges. 2 cubes net per sub tuned at 30hz!!

[EPerez 236]

You would get more room if you put port just on one side and subs on the other.

[J2phat4u 9]

Yeah I kind of figured that....

[J2phat4u 9]

The final results in for the enclosure....8.15 cubes net tuned to 31hz with 118 inches of port. Will this work?

[J2phat4u 9]

I am building a new enclosure. This one will be around 10 cubes tuned to 31hz with 150 square inches of port.