Hi jzagaja,
Could you link the original AVS thread or provide the thread title? I'm able to find lots of Seos related threads, but not what appears to be the original.
Dan
Are the SEOS waveguides still available?
I have made several wooden wave-guides on my lathe, a couple have been successful: One 7" for a older 2" soft dome Dayton mid range, another 5'5" for an older Peerless poly dome 19mm tweeter. It is tough to get smooth response from 1500hz to 15khz, in my experience (which is limited).
I came across a website, (I think they may be in Europe?):
https://audiohorn.net/tweeter-waveguide/
There is interesting DIY oriented content there with pictures of projects. They say they print the wave-guides, so it is probably a small outfit. The directivity graphs are impressive. They look kinda like SEOS; rectangular; Nice looking. Rounded over exits/edges.
They list compatible drivers from SB and Scan speak + others. Also woofer recommendations for SB, Purify, + others.
I have made several wooden wave-guides on my lathe, a couple have been successful: One 7" for a older 2" soft dome Dayton mid range, another 5'5" for an older Peerless poly dome 19mm tweeter. It is tough to get smooth response from 1500hz to 15khz, in my experience (which is limited).
I came across a website, (I think they may be in Europe?):
https://audiohorn.net/tweeter-waveguide/
There is interesting DIY oriented content there with pictures of projects. They say they print the wave-guides, so it is probably a small outfit. The directivity graphs are impressive. They look kinda like SEOS; rectangular; Nice looking. Rounded over exits/edges.
They list compatible drivers from SB and Scan speak + others. Also woofer recommendations for SB, Purify, + others.
Thanks for the info. I found this:
https://at-horns.eu/release/OS-SE Waveguide.pdf
There: "OS-SE Waveguide" and "oblate spheroidal (OS) waveguide"
So, I think I get it now: SEOS
I don't 3d print things, but my friend can. I can make wooden things, and use existing parts/pieces.
https://at-horns.eu/release/OS-SE Waveguide.pdf
There: "OS-SE Waveguide" and "oblate spheroidal (OS) waveguide"
So, I think I get it now: SEOS
I don't 3d print things, but my friend can. I can make wooden things, and use existing parts/pieces.
How important is surface smoothness of wave-guides/baffles to response smoothness in the upper audio frequencies?
I would guess any problems would be related to wavelength/diffraction, but what is the basic math concept, and what has been practical measured performance results?
Is, say, 10,000hz, practically effected by iterated/repeated, approximately 3mm bumps/edges? I assume that the lower a frequency is, the less it's propagation is altered by a given size bump or general surface roughness; Does this sound right?
Having largely craft-oriented skill-sets, rather than those of computer design tools, I have pictured experimenting with cut-out layers of approximately 3mm thick plywood/hardboard to build up expansion profiles of (overall) rectangular shaped wave-guides (with rounded inside corners).
For me, round wave-guides are most easily and enjoyably made on the wood lathe. The material cost is low, and the process is fairly quick and fun. But this only works for round shapes.
I would guess any problems would be related to wavelength/diffraction, but what is the basic math concept, and what has been practical measured performance results?
Is, say, 10,000hz, practically effected by iterated/repeated, approximately 3mm bumps/edges? I assume that the lower a frequency is, the less it's propagation is altered by a given size bump or general surface roughness; Does this sound right?
Having largely craft-oriented skill-sets, rather than those of computer design tools, I have pictured experimenting with cut-out layers of approximately 3mm thick plywood/hardboard to build up expansion profiles of (overall) rectangular shaped wave-guides (with rounded inside corners).
For me, round wave-guides are most easily and enjoyably made on the wood lathe. The material cost is low, and the process is fairly quick and fun. But this only works for round shapes.