Is it possible to cover the whole spectrum, high SPL, low distortion with a 2-way?

[phase_accurate]

I like the language of this brochure !
Regarding the x-over: I would say it is also 1st order on the woofer branch.

Regards

Charles

 

[Brett]

They http://www.richcomav.com/MaterialAttachPart/1221/max_2.pdf for some(?? ) reason called it "wide"

Interesting. Could make decent surrounds.

 

[phase_accurate]

Holger Barske has tested the MAX 2 although the version with a LTH 142 waveguide:

https://www.unison-research.de/downloads/Unison_Max-2_Test_LP_2017-04.pdf

Regards

Charles

 

[Ro808]

…. and that horn doesn't even cost a lot and doesn't sound horn-like in any way. The only disadvantage is its narrow dispersion.

regards

Charles

One 18Sound engineer went to work for Ciare (now owned by 18Sound) and designed a similar looking horn.

The same guy is also responsible for the Faital Pro horns.

 

[Ro808]

German manufacturer Seeburg Acoustic Line developed another interesting elliptical horn.

Nowadays, they mostly use the known Italian horns.

 

[phase_accurate]

I have seen the Ciare one on the US speaker website. It costs twice as much as the XT1464 and is only about 8" by 12" in size and made from cast aluminium.
It apparently has the same entry angle as the exit angle of one of the 1.4" RADIANs.

There is one big difference between this one and the XT1464: While the XT1464 is curved in the vertical and horizontal axis (I don't know what the mathematical function is on These) - this Ciare horn opens conically in the horizontal axis while the vertical axis is such that the area grows at a hyperbolic rate. It has therefore constant directivity in the horizontal axis and narrowing directivity towards higher frequencies in the vertical axis. A bit like the classic radial horns. There is even an academic paper around that deals with its development.

I was once interested in this one for a smaller MTM with 12" or 10" Woofers.

Regards

Charles

 

[Ro808]

Early pre-production Unison Max 2 with XT1464 and a prototype with XR2064.

 

[phase_accurate]

The rectangular one could also be the XR1496 with an oval diffraction slot. I guess the XT1464 is better soundwise that that one.
I wonder why they finally went for the LTH142 on the Max 2. Maybe just because it looks better than th XT1464. Who knows ?

Regards

Charles

 

[Ro808]

(Italian) article on Dario Cinanni's FMJ-60 Daisy driver and the PR 614 Horn.

 

[Ro808]

And his paper:

 

[Ro808]

The rectangular one could also be the XR1496 with an oval diffraction slot. I guess the XT1464 is better soundwise that that one.
I wonder why they finally went for the LTH142 on the Max 2. Maybe just because it looks better than th XT1464. Who knows ?

Regards

Charles

You're correct, it's the XR1496.

There is no reason to choose the LTH142 over the XT1464, other than looks.
All 18Sound horns sound good, although the plots vary.

 

[Ro808]

XR1496 data.

 

[phase_accurate]

The XR1496 seems to rely on diffraction while the XT1464 doesn't. This might cause some other differences than just the dispersion.
But I could imagine that it is probably less severe with its smooth lines compared to all the horns with diffraction slots designed with parallel sides and narrowing straight/flat walls behind them.

Regards

Charles

 

[Ro808]

Big Chinese elliptical horn.
Unfortunately these are not available as separate parts.

 

[norman bates]

Xr1496 horn.

Directivity plot looks nice and smooth.

I'd expect it sounds pretty good (reflections) except for a bit of a corner of mouth to baffle.

Now if we could get rid of that bubble in the throat.
Looks like my horn of now.

 

[Ro808]

You'll need the bubble, cherish it

 

[Ro808]

No bubble, yet not too bad.

 

[norman bates]

why do I need the bubble ?

Something about loading throat to mouth better ?

Do you have a "keep it simple stupid" answer for me, I'm curious..............

 

[Flaesh]

German manufacturer Seeburg Acoustic Line developed another interesting elliptical horn.

Nowadays, they mostly use the known Italian horns.

Ro, you know everithing
What can you tell about Seeburg 90x50 https://www.seeburg.net/pics/zubehoer/01598_K24Horn_2_de.jpg ?..

 

[phase_accurate]

Now if we could get rid of that bubble in the throat.

Norman, what do you mean by "bubble" ?

Regards

Charles