And I measure an SEOS H & V and across the diagonal and the diagonal was the worst of the bunch. Are you saying that this is not true? That I screwed up the measurements?
Actually, as probably many people who played with rectangular waveguides in Ath will confess, the diagonal polars are not seldom the best of them all...
Then what I said is true!
It's just that I quite like the free standing looks (and no, I don't like the idea a of curtains in front of the speakers in our living room
Then live with the compromises that "pretty" speakers entail.
Honestly as much as I admire the work that has been done here, I have to say that none of it is much of an improvement over what I made decades ago. Look at the polars of an NS-15 on my website and show me speakers that can match that performance (sure decades later people have come close to matching them, but I did this decades ago.)
I don't really see the disagreement here... If I'm reading this correctly, Marcel is showing that some rectangular waveguides can measure well on the diagonal, and Dr. Geddes is showing that some can measure poorly.
It comes down to a difference in design of the waveguide. SEOS and Ath-generated models are not the same.
It comes down to a difference in design of the waveguide. SEOS and Ath-generated models are not the same.
OK, I see what you are saying now (I missed the "not") - my data disagrees. If you are saying that one could design a waveguide such that the diagonals are no worse than any other angle, then yes, I agree. As the waveguide becomes smoother around its perimeter the diagonal problems get less.
Show me a waveguide with sharp corners that is "better" (or even not worse) along the diagonal.
Show me a waveguide with sharp corners that is "better" (or even not worse) along the diagonal.
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Come on, I have a 13" WG that beats your 19"...
I didn't agree that it was better, and I said so, it was comparable, but that was decades after I did mine. Today of course I would make the flare differently along the lines that you suggest, but I knew this all along - it wasn't new to me. You had the tools to prove it and I thank you for that.
As I said, I'm sure a lot of such horns are pretty bad. I never tried sharp corners so I don't have a clue how much is that worse. SOES doesn't have sharp corners either - many things can render the device suboptimal, that's for sure.
Back when the SEOS first came out it was stated that it was based on some of my work. But I thought the implementation was poor and I objected. To prove my point I measured an SEOS H, V & across the diagonal. The diagonal was the worst of the bunch, but given the poor handling of the mouth, I wasn't real happy with any of them. I was severely chastised for doing this and so I simply bowed out of the SEOS clan. The data was shown there many many years ago.
But luckily I did find them (attached.)
I can't upload them as they are too big. Maybe I'll figure something out.
But luckily I did find them (attached.)
I can't upload them as they are too big. Maybe I'll figure something out.
Attachments
