I you were to build three subs, each using identical drivers and tuning points, the only difference being cabinet size - lets say 2ft^3 vs 4ft^3 vs 8ft^3 with a tune of 16hz. What would be the performance differences between the three subs? I'm assuming you could fit the necessary port(s) into the smaller cabinet. I'm just trying to get an idea of how much effect the box size has on the end result. Harry.