4th Order Wall Help and Input Needed

[jeep187]

I am building a 4th Order Wall for 2 SSA Evil 15s

The Sealed Chamber for the 2 Evils 15s is 3 Cubic Feet Total after Displacement

Left Sealed Chamber 1.5 Cubic Feet after Displacement

Right Sealed Chamber 1.5 Cubic Feet after Displacement

The Ported Chamber is 6.71 Cubic Feet after Subwoofers Displacement and will be between the Left and Right Sealed

I was going to try the Port Opening at 12" Wide x 24" Tall

This is where i need all input and advice:

Should the Port be Smaller or Larger?

Plus numerous people are telling me dont worry about port length... It's the Port Area i need to worry about.

Please help and thanks in advance

[hdorre]

port area should be about half that lol

worry about area first, before you worry about length

the sealed chambers are a bit small. Id shoot for 1.7-1.8, unless you have a fuck ton of power

have any room for a larger ported?

[jeep187]

hdorre

I am running the 2 Evil 15s on 2 Strapped Crescendo BC5500

I only have room for 39"wide x 31"high x 22"deep

[diegoclass2010]

there is no recipe to 4th order... but yes sealed side looks kinda small i would shoot for 4 cubic feet sealed.. can you invert the subs to get more air space in the sealed section? has far a port area goes i go do anywhere from 120 sq inches to 200.. but before all that i would stick to a tuning frequency and work your numbers. how much power are you ruining?

[jeep187]

diegoclass2010

I am running 2 Crescendo BC5500 strapped