Can you hear the voice of the sea? [Midwoofer enclosure]

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Looking for a mid-enclosure with wide beamwidth.

I imagine I should avoid:
walls close to the cone,
parellele walls,
tube-like enclosure,
sphere-like enclosure,
...
Slowly I came to think of a form similar to the mid-box of the B&W 801.
By ear it seems to produce a white noise by a pass-band.
I decided to build the speaker.
Here I share the first steps:
 

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PRR

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Joined 2003
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I absolutely love your shape and molding technique!

What is "wide beamwidth"? 180 degrees? 360 degrees?

180 deg is real easy for a cone on a board, up to where cone diameter becomes significant and beamwidth falls. Is that a 3" speaker? Then it will be 180 degrees to around 1.5KHz, which is high for mid-bass. If put in the end of a tube (as you have done) it will approach 360 deg at 750Hz (and power output falls); if on a board it will be a consistent 180 deg to some low point depending on board size.
 
I had a powerful imprinting in the first 80', and I can't leave 5'' sealed, on a small baffle.
I've tried, but I can't. Only a brief intense betrayal for a dipole in 2010, incompatible with the rules of marriage.

Today's activity:
 

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Damping the walls by acetic silicone.
It will be necessary to wash and neutralize after a couple of weeks.

The cylindrical shape of the tail (wrong?) acts as a resonant high Q branch.
Do I need to change it to a cone?

Damping the tail I get my far-resonant cavity.
 

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