F3 Roll off

While this is great and really close to or the same as WinISD. The F3 per the graph and WinISD are correct, but the ones in box parameters are not. They should be 25,85 and the bandwidth around 52.

Also, not a big deal but the Rear/Front are still backwards compared to most other programs. Rear being low, front being high.

Hi. I didn't fix it for Parallel

What about F3, Speaker Box Lite counts -3 dB after higher point for BP6 as I remember. Thanks for your feedback