Fiberglass horn for BMS 4595 ND

They would be so lost over 8 hogs and 4 rb212. Could probably just put one inside each rb212. Not a bad idea that but be a low stack.

krazyneil wrote: I think you'll struggle running these drivers from 340hz and getting it to sound good ,even the 4592 is hard to get it to sound spot on below 800hz

That's good info, I had wondered how a one horn could cater for that range.

Robbo wrote: I have five of the Ohm horns--Will do a good price on them as you would have to pay full whack on the sixth one from the Ohm factory.

Out of interest robbo, do you have any pictures of these horns?

Also, why 340hz? Thats pretty damn low
If you intend on running a front loaded driver below it then 800hz should be easily doable even with a 15". With a proper hornloaded midrange 600-800 should be easy peasy as well. If you intend on running it directly above a 15" bandpass horn then forget it, it wont work properly and sound good.

On the dispersion Vs loading vs preventing resonances; i have written a lot on this subject in particular regarding my quest for a proper 2" horn for my 4590 and have a lot of experience in what works and what doesnt both from practical experience with several horns as well as simulations (axidriver, comsol) and hardcore theory (beranek is a must read).

The more i learn about the topic, the more i tend to believe that constant directiviry is something that is usually not achieveable across such a wide bandwidth and the design that do come close are usually terrible when it comes to distortion and resonances.
The good commercially available designs that are marketed as constant directiviry usually are not really CD. The elliptical 18sound range is a good example. Its pretty CD across the midrange and higher mids but at the top half octave its not. Still however they sound brilliant because of their lack of diffraction slot, generous size and generous roundover near the mouth. The distortion this provides (low) and lack of resonances makes them so popular in the diy community even though they really are not what is clasically considered as "constant directivity" in the classic sense.
To me, this is worth so much more than the perfect control at higher frequencies.
The xt1464 for example, is in my eyes, one of THE best commercially available 1,4" horns money can buy. Even better; they are stupidly cheap.(i just wish an aluminium version existed, and no, the XR is definitely not a competitor although also very good).

But like i have advented many times before, i just wish they would make a 2" version of it, but then even slightly bigger mouth to support lower frequencies.
I have a 3D cad model of such a horn on my computer with simulated ( in my eyes) perfect horn geometry and resulting directivity (will make you drool) but not the tools to prototype it.

Search for "Teunos 4590". There are some more useful posts i have written before.



Edited by Teunos - 05 February 2017 at 2:14pm

I mentioned VQ60 just as a size example.

50 X 50 Would be a good size. The rb212's run 90-350hz fl horns, hence the idea of a coaxial horn instead of conventional two way top.

Something in the range of 90x60x 80 deep would be ideal :)

Could probably cross higher, here is the rb212 measurement (unfiltered):




Looks okay upto 450hz to me.

Edited by SouthwestCNC - 05 February 2017 at 3:48pm

Some more threads