I still contend that these "optimized" designs are not any better in the end, only different. The M2 waveguide looks cool (and now everyone can easily make their own for any driver available), the rest is just hideous.
For those making their own M2 clones now, this is the influence of the 'Shape.StretchExp' parameter (1.1; 1.5; 3.0 ~ abrupt, ..., gradual).
Also note that you have to increase the 'Mesh.*Segments' values to capture the surface details.
...but then I guess that with a real driver it will still resonate due to the length of its phase plug, won't it.This would be not so bad -
No problem. So what do you get from those plots?Thank you, I hadn't noticed the latest posts, mea culpa.
...but then I guess that with a real driver it will still resonate due to the length of its phase plug, won't it.
That one looks surprisingly similar to JBL's latest waveguides as used in the new (Synthesis) HDI-series.
Check the pronounced pointy phase plug. The driver's exit section is different from the older JBL speakers with Image Control Waveguides. In the angled view a section is visible between the WG's throat and the phase plug's point, which looks like either a tube shaped section, or the phase plug channel exit(s).
I prefer the M2 result as it keeps the "correct" order for the curves, i.e. the on axis output is higher than the off-axis and so on. The output at 30-deg off axis is higher than the on-axis for the ATH between 3 and 5 kHz, that can't be good.Now let me show you someting:
- the plots below are for horizontal, vertical and diagonal polars (a 7.5 [email protected])
- on the left is the M2 clone (shown before) labeled "X", on the right an OS waveguide made squarish, aka "ATH"
- these two have the same throats (33 mm) and are about the same size
ATH has nothing you would call a diffraction slot, I assume. What is the supposed beamwidth that would be impossible without it? I just can't see where is this M2 clone actually better. I see a tighter pattern control with the ATH overall, it is virtually as good diagonally as horizontally or vertically. What I am missing? I'm sorry but this "optimized diffraction slot" thing seems like a fairy tale to me.
Yeah, those look perfect!