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View Full Version : 1.73@30hz - Check Calculations PLZZ



KernNeiW
12-30-2011, 07:48 PM
Enclosure is for a Sundown SA - 12. do my box calculations look correct?
my first time building a ported box.

W 32.5 " X D 14.5 " X H 13 "
2 " slot port tuned at 30 hz with a height of 11.5 = 35.8 in length
Gross volume of box is 2.68, 1.73 cubic feet net (excluding the volume of the actual woofer) with 70 sq inches of port area

Please help! thanks!

kushy_dreams
12-30-2011, 07:57 PM
Port needs to be bigger and it would be a good idea to add 45s in the corners and I would move the mounting location of the sub to the left, towards where the port exits the box.

You have 23sq in of port area, idk how you got 70sq in.

You actually have a lot thats incorrect there, I dont have time to type it all out. Someone else will chime in.

Kangaroux
12-30-2011, 07:58 PM
http://i.imgur.com/5u5Dz.jpg

KernNeiW
12-30-2011, 09:43 PM
kushy, i agree on the 45 degree angles at corners and can see to an extent of the widening the port slot (but I'm still achieving my desire of 30hz with 2") ... but i don't really see any other issues.... according to kangaroux schematics, I'm right as well.