Ok, I still am having a hard time with this square port conversion or addition of another sub. Ok, let say you have 1 10in sub and port dimensions are (square) 2.5x5x12.5, Now I know the length stays the same but, lets say I want to add two more subs how do I determin the length and width of the port for the additional subs?
Thanks
You can separate each sub into its own chamber and each one will have a port at exactly the size of the first one. Or, you can start getting aquainted with a box-building program and use it for your designs. WinISD Pro and Unibox are two free ones that I use.
BTW, the length of a port only "stays the same" if you are converting round to square or vise versa. When you add subs to a common chamber, all dimensions will change to get the same tuning frequency and control port noise.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
I would go the 3 chamber route as well, makes for a stronger box and if you lose one sub to having the magic smoke that makes it work escape, you can still continue to use the other two.
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Top Secret, I can tell you but then my wife will kill me.