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!It provides 4 x 15" bass drivers which form a cylinder wave in the low frequencies
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!
Fabric on the front is masking them - two are above horns, other two below.can't actually see where the quartet of 15" bass drivers stack in that setup
Fabric on the front is masking them - two are above horns, other two below.
On this photo they can be barely seen:
https://6moons.com/wp-content/uploads/audioreviews3/acapella.hyperion/04.jpg
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.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!
Looks like a high-school wood shop project.
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.
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?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.
After 166 pages, something that actually looks good.
Who doesn't want a speaker that says 777 hypercar on it?
I have never heard one but Davone speakers always look good to me.After 166 pages, something that actually looks good.