18” down-firing EGG shaped sub build…

[JohnMichael]

I think you have created Modern Art for the Chicago Art Institute.

[GMichael]

I think you have created Modern Art for the Chicago Art Institute.

I did save a few of those crescent moon looking pieces. A layer of clear-coat and they may look nice nailed to my deck.

[Dual-500]

Absolutely cool! Be sure and post objective performance results. Nothing like a good, one of a kind audio project.

I run a single 18" sub in my system for now. Will morhp into a 4x18" in the next year or two. After running 18's there is no going back.

Beautiful wood work too. You have the skilled hands of a craftsman.

I'd be inclined to use some filler in it - experiment with that in real use. The mass of air within it will have resonance as a Vas only. Reflected energy should be nulled out by the shape.

Filler could actually enhance the lower extreme performance in this setup.

[Dual-500]

Interesting chart from the BFD. How does it work? Does it sweep a single tone or a more complex waveform like pink noise?

Tuning from a pure feedback point condition has it's limitations in a dynamic environment. That being mentioned, for theatre it could be a good way to go. What about the rest of the system? Any electronically assisted tuning there?

Not criticizing - just wanting to open up some discussion on the equipment and how it works.