Quote Originally Posted by DNV47 View Post
If you look around the Internet you'll also see speculation about "double box tuning" because the 811 horn box is opened to the woofer box increasing the volume BUT it's not a 100% opening.

Seems to me that only the designers know the real reasoning behind that.
You can sim it in LspCad, AkAbak and probably some others, but when I did it all I got was a completely insignificant blip in the 200-300 Hz BW, so assume it was a marketing decision.

GM