@Audiofrenzy
a sphere has bafflestep as others shapes but the baffle diffraction (caused by the edges) is only 0,5db.it has the lowest ripple in the frequency band caused by baffle diffraction.
a regular box shape has a ripple about 3db.
shapes:
- Sphere ± 0.5 db.
- Rectangle ± 3 db.
- Beveled rectangle ± 1.5 db.
- Cube ± 5 db.
- Beveled cube ± 1.5 db.
- Cylinder ± 2 db.
Mr. LR examples diffraction (might be interessting)
I'm pretty sure Magico got that Klippel Near Field Scanner to verify their designs. The woofers won't have much of a benefit if at all from back mounting but the posted measurements for the M2 already show that the tweeter and midrange do benefit from the way they mounted them in that rounded enclosere. I don't think the M9 will measure worse. And I do not believe it's all done for the looks either.
Even though the Magico's are priced way up in the stratosphere, have an elaborate enclosure that may be called overdone or ineffective for the cost, I find it refreshing to see them use a Klippel Near Field Scanner and to see a return to the effective round shaped enclosures (which they already had back in 2004). They get rounder the more you go up in their price range. Just like it is with JBL and Kef by the way.
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look at first post Magico picture. The bass drivers recess are elliptical : wave guided on top and bottom of the bass drivers and near to flush mounted at rubber surround heigth for the left and rigth side of the bass drivers.
First time I saw that was on Focal loudspeakers !
Wave lengths in the upper bass are bigger than the diameter of the cone driver but does a bass WG (short deepness, as the post 1 picture) increase the cone diameter in one direction (vertical) in order the driver see less the vertical front baffle (to make the baffle step in that direction more equal to the (shorter) width of the front baffle?
First time I saw that was on Focal loudspeakers !
Wave lengths in the upper bass are bigger than the diameter of the cone driver but does a bass WG (short deepness, as the post 1 picture) increase the cone diameter in one direction (vertical) in order the driver see less the vertical front baffle (to make the baffle step in that direction more equal to the (shorter) width of the front baffle?
^That elliptical appearace comes from the box being not sphere or square, but rectangular, with curved baffle. Unavoidable and a drawback from ideal.
Yes, it's just the shape you get..
Take some PVC pipe and use a hole saw to drill a hole in the side, then try to fit a disc into it.
Take some PVC pipe and use a hole saw to drill a hole in the side, then try to fit a disc into it.
I believe it rather comes from the shape of the front baffle that is bumped, curved, so not flat.
I think the two drivers mounted above each other like that does more for vertical directivity than the enclosure shape would do at those frequencies 😉.
imo : only above the 1/4 Wave Length center to center between them and above 4 Pi radiating of the bass drivers
Is there a dislike button?
Because that is fundamentally untrue.
Something only becomes a waveguide when in becomes into a certain orde of magnitude compared to the wavelengths.
You can't call a small edge a waveguide when used in subwoofer range.
This is also immediately the answer to the initial question.
I don't see waveguides.
I see edges and speakers rear mounted on a custom made baffle.
That most certainly make them waveguides.
That's the next step when we compare the nearby objects to the involved wavelengths.
Surely a waveguide should couple with the wave-front, otherwise it's a diffusor 😉
In the end I would say those bevels around the woofer do basically nothing because the x-over below the frequency they would do something.
In the end I would say those bevels around the woofer do basically nothing because the x-over below the frequency they would do something.