Hi Sonnie,
That's a nice curve you've got there
How do you get the sub to roll off so gently? I've got the same 2 PB12+s and they roll off really steep at 80 hz. Both tuned to 17 hz with port plug in. I've got them in close to the corners and I have really strong bass below 20 hz but seems to roll off so quick. What do you have the crossovers set to?
Cheers,
Bob.