Voice Of Lancelot inner structure! (The making of the cabinet for Altec 515C reaching below 20Hz)

This loudspeaker cabinet is my original design, the summary of my knowledge on current loudspeaker design technology. Has still areas to improve, yet (I think) it's quite far ahead of current loudspeaker concepts. The result is an approx 102dB/Wm sensitivity loudspeaker, with low end response capability to below 20Hz. (My in room -6dB point is estimated at 14Hz.) Also, the operation mode is largely OMNIDIRECTIONAL, 250Hz-450Hz having directionality to it. This results in a unique full range AND dynamic sound that I have not yet experienced from any other loudspeaker. (Current and old designs are either full range OR dynamic, but not both... )