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bvr_j_0969
11-05-2008, 02:20 PM
im looking at building a wall in my truck for 4 re sr15's

the box is going to be 13.1 cft gross before any displacement.

does anyone know what kind of port area i need so i wont have any port noise?

psych0ticnemes1
11-06-2008, 02:42 PM
Minimum port area = (Net Volume x 12)

13 x 12 = 156 square inches of port

I usually use 15 as my base for port area so that I can be sure that I will not have port noise.

bvr_j_0969
11-08-2008, 10:00 PM
thank you this helps alot, ive had people tell me like 10 square inches per cubic foot was a good rule but i guess they were wrong.

01 S 10
11-08-2008, 10:02 PM
NET volume, so dont multiply 13.1 by anything. estimate a port that size to take up to 2cf, then bracing and sub displacement, you should be just over 10cf net

you should figure out how much net volume you want (or can fit) and adjust the size of your wall to accomadate the port/subs/bracing displacement

so 10cf net + port, etc, etc

i have 160 square inches of port for a 9cf net wall, a little on the high side, but 15 square inches per cube would be ok, so 150 square inches of port for your 10cf net wall