Im looking to build a box for my 2 18's. Subs up port back slotted across the bottom.
INTERNALLY my box design is 22.125" height, 36.5" width, 35" depth.
Which gives me 16.357 cubes.
My port is designed to be 6" tall and 36.5" wide inside and 26" deep, which displaces 3.63 cubes.
(using box bottom and sides as 3 of the port walls)
So im left with 12.72, my subs wont displace anything as they will be invert mounted, then after some dowel bracing Im estimating Ill be at almost bang on 12 cubes net
for the pair
Now what Im a little stuck on is if I punch those number in 12volt.com and carstereo.coms calculator I get much different numbers. Im loolking for 36hz and I think my port @ 26" deep gives me that.
Carstereo.coms calculator seems off though, if you punch my numbers in and select the "slot port yes" option it says to make my port 6" long, but if you only change it to slot port no, it goes to 24"... but my box technically is a slot port so I dont know what to think here
Anyone have any opinions??
I plan to make a port plug to turn the port into something like 24" X 6" which would turn it to high twenties tune.
Im thinking of building this tomorrow if I can get some confirmation on my numbers!!