max width im willing to give up is 44 max depth is 28 leaving about 4-5 inches between box port and rear doors and max height im willing to go is 22 inches but my windows on the back doors of my suburban are at roughly 18.5 inches and i heave heard you want to try and keep them below the window line dont know how true that is though, im trying mainly for "jaw dropping bass" then I am SQ (i know 1500 watts for jaw dropping is a joke compared to some of the system on this forum lol) so thats why I was trying to tune around 32hz, if my subs over power my mid ranges for now then im ok with that it just gives me an excuse to buy better speakers and another or multiple amps lol. Again I have read and I dont know how true it is that subs up port back is the way to go in suburbans and tahoes so I thought I would run it like that. I was planning on running a slot port design hence why my port was much longer then tall is I was going to do a common chamber box subs up and the slot port along the bottom of the box facing the rear doors, but I do like your box/port design much better then my Idea with the port on the bottom seems like that seems like yours would transfer sound better.