I just got in my 15" xl's and working on box designs. I'm in no rush so I'm looking at all possibilities at this point. my max dims are as follows and ill give u two based on sub up port up or sub forward port up.
SUB UP PORT UP- 15.5H, 35.25W, 26D
SUB FORWARD Port UP- 17h, 35.25W, 24.5D.
Throw at me your suggestions for slot port or aero like ports. Most likely if its an aero port ill be using PVC
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