Aluminum cone/bullet shaped thing placed on top of speaker

[restorer-john]

I reckon those "acoustic beaks' were originally on display in a speaker manufacturer's showroom/stand at a show showing the component parts of a driver. They appear to be exactly the same style as a spun-aluminium phase plug in a woofer.

Here's a few on speakers in my listening room:

 

[theREALdotnet]

They certainly have the characteristic of Pointyness.

Nobody could claim they’re pointless, that’s for sure.

 

[Frank2]

Better use a hefty dumbell weight if you want to limit resonances of the top of your speaker cabinet...

 

[fpitas]

Better use a hefty dumbell weight if you want to limit resonances of the top of your speaker cabinet...

That may be the super-audiophile effect the "Golden Ears" hear.