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Most beautiful speakers in the world ?

The (marble?) cable lifters scratching the nice wood floor maybe?

Good point. Felt layer needed, definitely.

Or a zip line for (electron enhancing) critters!;)

Nice. We already have plankton in service for DAC sonics, there must be a suitable genera for those amplified analog waveforms. So many untapped possibilities for the high end cognoscenti.
 
Another vinylphile with a very expensive rig and what looks like 25 or 30 LP's. LOL
Your rig should cost at least 20x your vinyl collection! Of which, the cables should be nominally 20%! ;)
 
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Nonsense! Signal with 50 Hz has 6.9 m wavelength, so half-wavelength is 3.45 m - much higher than the speaker itself, so no cylinder wave is formed there!

Vertical axis? But people who imagine bass notes don't exist in small spaces should think about headphones and ear canals.

*otoh, can't actually see where the quartet of 15" bass drivers stack in that setup
 
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Quite different

Davone Audio Studio​


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Nonsense! Signal with 50 Hz has 6.9 m wavelength, so half-wavelength is 3.45 m - much higher than the speaker itself, so no cylinder wave is formed there!
For any real world example floor and ceiling reflections have to be taken into account. You definitely get a cylinder wave or a wave between a sphere and a cylinder wave if you got really high ceilings.

While the 50Hz case is still interesting and a cylinder wave provides benefits due to the better distribution of bass in the room. The room still dominates the frequency range since the room is acoustically small.

More interesting is the case of the bass higher than about 200Hz, where the transition between room dominated sound and direct sound domination happens. Especially in this frequency range a cylinder wave has some significant advantages. E.g. the cancelation due to the first floor and ceiling reflections doesn't happen.
 
For any real world example floor and ceiling reflections have to be taken into account. You definitely get a cylinder wave or a wave between a sphere and a cylinder wave if you got really high ceilings.

No, you don't get a cylinder wave with only a four 15" drivers vertically stacked, even if you take into account floor and ceiling. In the middle of the Acapella Hyperion there is a huge gap between the two groups of 15" drivers (right where the horns are).
With really high ceilings it is even worse - there will be a huge gap between the top of the loudspeaker (top 15" driver) and the ceiling.
 
No, you don't get a cylinder wave with only a four 15" drivers vertically stacked, even if you take into account floor and ceiling. In the middle of the Acapella Hyperion there is a huge gap between the two groups of 15" drivers (right where the horns are).
With really high ceilings it is even worse - there will be a huge gap between the top of the loudspeaker (top 15" driver) and the ceiling.
The gap is about 80cm so you get a perfect cylinder wave at 100Hz and below. Going to higher frequencies you get a mix between cylinder an spherical wave with some cancellation at positions near the ceiling and floor. This behavior is much better compared to any standard tower or even bookshelf speaker in a real room. The discussion gets of topic here maybe start a discussion in a dedicated thread?
 
Since most of the speakers shown here look like Dr. Fred's creations, here is the original:
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