The video doesn't show much. They aren't running those sweeps at anywhere near maximum volume, so we have no idea about the dynamic range of these subs. We only know the base frequency response. Their testing was done with all ports open which hurts extension on the PB16-Ultra, and if all they cared about was the nominal low-frequency extension, they tested the PB16-Ultra in the wrong configuration. All we know from this video is that the Klipsch is more deeply tuned than the PB16-Ultra with all ports open, or the Klipsch's high-pass filter uses a more relaxed slope. Not surprising since the PB16 uses a 20Hz tuning frequency with all ports open and a very aggressive high-pass filter below that.