Ok so im working on my box and i have the option to do 2 8's or 1-12" aero port for my box. Im not sure which will be the better way to go and i know they equal roughlly the same thing. This is what im looking at.

-2 Soundqubed SDC2.5 15s
-Enclosure will be 8 cubes(4 cubes per sub) @ 40hz either way
-Power for now 1600 rms(will soon be about 3k before rise and voltage drop aiming at 1k per sub)

Ports:
2 8" Aeros - 100.48 sq inches / 8 cubes = 12.56 sq inches port per cube

1 12" Aero - 113.04 sq inches / 8 cubes = 14.13 sq inches port per cube

The 1 12" will give me alittle more port per cube then the 2 8"s, also ive always seen and been told that less ports are more efficient.

 

With the 1-12" port i would have 8" on the inside of the box between the port and the back wall of the box, and outside i would have 6 or so inches between the port and the hatch. I have had a few ppl say the 1-12" aero would be fine this way and the 12" is my preference between the 2 just looking for thoughts.

 

It would be the same as above^ way with 2 8" ports as well.

 

 

 

What do you guys think?

 

Optimum port area has NO RELATIONSHIP to the box volume.  This is kind of a bad rule of thumb...

 

The only way to know if your vent has enough area is to model for Vent Velocity.

 

"Less ports are more efficent" = Basketballs make good salad dressing

 

Honestly though, both vent options should not introduce much compression with any 15" drivers, I would go with whatever option fits your build better...