I'm wanting to build a ported box to go under the rear seat of my truck as I can get a box with enough airspace since my sub only requires 1 cu ft ported. My issue is that I don't begin to know what I'm doing with slot ports. My box will be roughly 19L x 20W x 8H, and my subs are upfiring toward the seat. I'd like to be tuned at 33Hz, Any ideas on port designs
