Acoustic Horn Design – The Easy Way (Ath4)

You can change that manually in the file lib\scripts\report2.gpl.
Change these lines -

set xtics add ("0.2" 0.2, "0.5" 0.5, "5" 5, "" 15, "20" 20)
set logscale x
set format y "%.0f°"
set xrange [0.2:20]

to something like this:

set xtics add ("0.1" 0.1, "0.2" 0.2, "0.5" 0.5, "5" 5, "" 15, "20" 20)
set logscale x
set format y "%.0f°"
set xrange [0.02:20]

I think the horn is superb.

Easy peasy, thanks
600mm_20Hz.png
 
Are you referring to the measurements in #5038? To me that's a different situation with the waveguide being completely on top with no overlap and quite some air inbetween. But it does in some sense lead me back to the question from before: how much space does there need to be around the waveguide for it to remain acoustically independent? Be it vertically, horizontally, z-axis etc. Would a rectangular waveguide on top of a woofer cabinet gain independence when there's a gap of a couple of centimeters?
 
Measuring one of your perfectly terminated waveguides on top, in front and with various overlaps etc would be extremely revelatory. But that's a lot of work!

Personally I would also be curious to see what happens when you take a classic "waveguide in a baffle on top of woofer" speaker and detach the two parts and insert a gap. I could actually do that sometime, but would have to take a saw and split baffles into two pieces that took me a long time to plaster and sand into one smooth unit! lol
 
That is about the same size (ignoring the symmetry) as the largest available waveguide with similarish design principles, the SEOS-24. Is there a way to model the SEOS waveguides in Ath4 to see how much of a leap this new generation of waveguides is?
 
Here are some measurements of SEOS24 SEOS 30 or 24: worth the upgrade? | AVS Forum

Looks like waveguides seen in this thread so far beat it at the high frequencies >5kHz at least, but those frequencies are so high it could be the driver throat matching the waveguide throat problem. Most compression drivers have conical exit section which requires some refinement to the waveguide which is easily done with ATH. Some examples in this thread somewhere.
 
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Yes of course. And I expect it to be inferior to these new designs based on your software in every regard, but I would still very much like to know how much of a leap we're talking about.

I still believe there are benefits to non axi-symmetric waveguides depending on the use and implementation and it's easily available in a build quality that's hard to do DIY and it's cheaper too.