It's not so easy taking a CD apart and putting it back together so that it meets specs. What you show is the back panel removed, not the phase plug. In many designs the phase plug in integral to the design and cannot be changed.
The simple reason that no one does the phase plug as an extension of the waveguide is because there is no single waveguide design to mate to. Making the extension/phase plug as short as possible is then the best solution.
The simple reason that no one does the phase plug as an extension of the waveguide is because there is no single waveguide design to mate to. Making the extension/phase plug as short as possible is then the best solution.
What about using a free standing midrange waveguide, instead of a direct radiating woofer of similar size? This is for a ⌀100 mm flat piston, ⌀380 x 100 mm overall. I'm only not sure it would reach low enough to overlap with the subs. Maybe with a bigger transducer. The advantage could be smoother response around the crossover frequency, I guess.
- Maybe this could be made elliptical and reduce the C-C
- Maybe this could be made elliptical and reduce the C-C
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Most interesting thread for me. I would love to see a simulation of a horn capable of a response from ~100hz to 5khz (or higher). The 100mm/ 4" Purifi driver might be capable. My dream setup would be an infinite baffle with this horn, bass and treble of equal output. My computer skills are not up to the task.
My sole motivation was to get the same (or better) directivity as that of a large woofer, without the issues of a big diaphragm. Probably it's not a very good idea overall, I don't know. It may need an additional woofer. Or not - depends on the SPL requirements.
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No, it's about the same size a woofer would have - that was the aim. To replace a large woofer in a two-way loudspeaker by something with a similar DI but smoother frequency response.
(Made this way, it may require an additional woofer, i.e. it could be a three-way with a dedicated bass transducer - no DI requirement anymore, just a volume displacement).
(Made this way, it may require an additional woofer, i.e. it could be a three-way with a dedicated bass transducer - no DI requirement anymore, just a volume displacement).
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As I imagine it - free standing "regular" WG with a CD, below that a box with this midrange WG (so not free standing) on the front and bass drivers on the sides.
Maybe both the waveguides could be free standing, one above the other. It only limits the space for a bass enclosure (which should not obstruct too much, IMO).
Maybe both the waveguides could be free standing, one above the other. It only limits the space for a bass enclosure (which should not obstruct too much, IMO).
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Hi mabat!
"Transition Horn" sounds familiar, and looks familiar
Are You aware of the "Horn Speaker Having Continuously Changing Cross Section" concept?
AES Paper 1987
Is Your concept related to it in any way?
Please take a look at it, I'm very interested in Your opinion.
The thing has been implemented in Onkyo GS-1
I like it! Seems like we would only need it to get down to our rooms' Schroeder frequency, then an adjacent woofer and multiple subs.
You continue to impress,
Bill
Sorry, I don't have access to that. Are there any measurements in that paper?
Honestly, I've never read much about horns, except Earl's work and perhaps Don Keele's. Actually, I'm quite ignorant when it comes to horns...
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