Thank you for your reply, my current ported boss is 29Lx11.5Hx19D and is 1.4 cu ft of airspace, tuned to roughly 40 Hz.
I recently decided to invert my subwoofers to see if I can get lower then before. I do get lower but it obviously adds depth to my build and the subs stick through the fold down seat.
I hear you on the, not ideal for sealed enclosure but I have the manual and it gives build options for a sealed. I was looking for SQ, as of now some songs just don't sound right with a ported setup.
I'd like to build a box with the subs inverted on top of the box and center slot port,max length side to side 30, height 14, and depth less than 19 inches.
I have bass box 6, winisd but have trouble getting the build accurate. Maybe I can get some help here ?