They'll make it right I'm sure, but not in a timely fashion. For now, just use the ones you have- the "phase plugs" are really not acoustically significant on the 18"s, they are more valuable in terms of avoiding dustcap resonance and adding heatsinking. 1/4" won't matter except visually.
Oh, you're completely in the right to be frustrated. But it's a boutique product and unfortunately these things are common in tiny shops. I wouldn't worry about the driver build itself, AE does a really nice job, it looks like the phase plugs were an afterthought.
Having a situation with Acoustic Elegance. I was to receive the phase plugs for the 18h+'s (yeah he sent them without for some reason) some time ago, nothing came of it, I texted them and he sent them out in the next few days (pretty sure they forgot about me though he had an excuse) I finally received the phase plugs and it turns out I've been sent 2 phase plugs with about 1/4" height difference, so I let them know about it and they said the shop who made them must of made a mistake....but they haven't responded to anything since that statement. I've sent a few messages and nothing has been replied, that was last week... I think I have a pretty mild manner about myself...I am sorta scared about the quality of the woofers I bought... maybe they forgot to ... maybe accidentally the wrong glue used on the surrounds of just one of the speakers.Someone tell me just be patient and it will all be ok. I sent one message a wk ago saying "do you want me to send these ones back" and another yesterday saying "are you going to send another pair to be exchanged?" and both messages are seen (you can tell in messenger) but no reply.....
I warned you! but I hope you get sorted for the sake of this thread and all the effort so far. There are a lot of disgruntled customers out there
The base horn was 82cm deep (axial), 62cm wide and 34cm high.
The added round over made it 83cm deep, 73cm wide and 44cm high.
The base horn mouth was not flat so I provided the largest dimensions.
Thanks for the info. Not a problem for me to configure it or even build it as required. It looks like I have a few options for stock machines that could sit as a compute server in the basement so I wouldn't have to hear it.
Offloading the sims to another machine will work (I do this with @docali) but you need a proper ABEC license so the solution (solve) file can be returned. We were fortunate enough to get a license under non commercial hobbyist terms from Joerg Panzer @ R&D-Team - Software Development
Radial horns overlaid with the drba_swh160_sf138_se6p (pinkish), from left to right [drba_radial_grt_1, drba_radial_001, drba_swh160_sf138_se6p]
One of the radials is smaller. It might be worth simulating, and maybe a trial print first build, but it does not look like it would suite your long term goals.
P.S. the sim (dxc464_01) I'm working on now had model problems so it will be delayed another day.
Attachments
Thanks, Don, for this nice overlay!
These radial horns become very wide with respect to their horizontal dimensions. So, not really what camplo intended with his size restrictions.
Furthermore, this radial horn has a rectangular throat. I remember that it took some time to have a good base model for the round driver in the simulations. Is it straight forward to adopt this to the rectangular case? I agree that it would be of high interest to see how these perform. Although, the radial is what I call a "behave to nothing" horn while the SWH is a "behave to something" horn. The radial has no overall construction wave front. Only the horizontal profile behaves to something. The vertical was chosen to get a certain mouth exit angle.
The SWH is a behave to something horn and we know that it has very good and even loading characteristics. We see this from the nearly straight trend line in the sims.
If camplo would like to build a smaller model horn he should use the same horn as the target design but only scaled down. I think 400Hz would be a good model.
These radial horns become very wide with respect to their horizontal dimensions. So, not really what camplo intended with his size restrictions.
Furthermore, this radial horn has a rectangular throat. I remember that it took some time to have a good base model for the round driver in the simulations. Is it straight forward to adopt this to the rectangular case? I agree that it would be of high interest to see how these perform. Although, the radial is what I call a "behave to nothing" horn while the SWH is a "behave to something" horn. The radial has no overall construction wave front. Only the horizontal profile behaves to something. The vertical was chosen to get a certain mouth exit angle.
The SWH is a behave to something horn and we know that it has very good and even loading characteristics. We see this from the nearly straight trend line in the sims.
If camplo would like to build a smaller model horn he should use the same horn as the target design but only scaled down. I think 400Hz would be a good model.