Could someone explain to me a little bit about the way this sub is modeled? I say this because I'm new to WinISD but I'm showing 2 drivers in a 4.8 ft^3 box, exceed xmax at 28 hz with just 500 watts of input power. I saw it suggested earlier to run them at 2 ohms for 775 watts per driver which would exceed xmax much earlier. Also, I know the 300W rating is just the power handling of the voice coil but is it safe to put 775 watts into a 300 watt driver? I know box design plays a large part in power handling, but I'm still not clear on what is acceptable and what is not.
I'm mainly asking for my own knowledge as I'm trying to design my own DIY and this looks like a very tempting option.
EDIT: Ok it looks like 775 watts was suggested for a smaller box, but the general question still stands... The modeling shows this design exceeding xmax with 4.5 ft^3, is this a major issue? How does that affect performance?