Very impressive.

I don't suppose you are local? I'd love to see this in action. Any chance you'll share details on the enclosure?

My simple mind says that to do this, you'll need to drive the woofer way beyond its BL limited xmax, toward its true mechanical xmax (sort of like a slingshot effect). Along the way, you'd generate lots of odd order harmonics, which would boost the spl.

Did the 147.3 come at the beginning of a burp, or did the system build up to it? I wouldn't guess you could play it all that long at that power level.

Don't take any of this as bashing...I'm just curious.

Toby