2.5-2.75 per speaker. 2 cubes per speaker if you have a 1000 watts per speaker. for daily they can handle up to 2000 watts each in a 2 cube boxWell like I said It's only going to cost me another $60 or so to upgrade to the 1500W bx1500d...so if I can get a significant improvement in performance from that switch ill do it (sorry if I sound stubborn about it). Would that change the dimensions I would want for the box? PSturmer I'm assuming you mean 2.5 - 2.75 cubes for the entire ported box? As in 1.3 each or so?