Hi All,
I working on a design of a round speaker consisting of a 12 inch subwoofer and a full range speaker opposing each other with a horn around the equator of the orb.
The benefits of not having straight box type edges should help reduce resonances.
I am curious about how diffraction will work on the design? Any ideas.
The speaker will also be DSP tuned and amplified.
I'll post a picture of the design I'm working on.
I working on a design of a round speaker consisting of a 12 inch subwoofer and a full range speaker opposing each other with a horn around the equator of the orb.
The benefits of not having straight box type edges should help reduce resonances.
I am curious about how diffraction will work on the design? Any ideas.
The speaker will also be DSP tuned and amplified.
I'll post a picture of the design I'm working on.
Yeah, they need to play.
This is my wireframe showing the two speakers:
- Dayton Audio LS12-44 12" Low Profile Subwoofer
- Tang Band W5-2143 5" Full Range speaker
All flanges are braced by vertical vanes, it will be structurally solid.
It will be omnidirectional, 37 cm across.
This is my wireframe showing the two speakers:
- Dayton Audio LS12-44 12" Low Profile Subwoofer
- Tang Band W5-2143 5" Full Range speaker
All flanges are braced by vertical vanes, it will be structurally solid.
It will be omnidirectional, 37 cm across.
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does look like there would be a huge amount of diffraction where the two profiles meet and when you hit the baffle.
since is pretty symmetrical, maybe you could very easily simulate it in Axidriver?
since is pretty symmetrical, maybe you could very easily simulate it in Axidriver?
Omni-directional speaker.
Have you studied the design science and listener reviews on the Duevel Bella Luna speakers?
You could put a soft-foam hemi-sphere on the top for style and diffraction control. You could cut up a soft-foam water pipe insulator and glue to the top bass cabinet edges for diffraction control.
Have you studied the design science and listener reviews on the Duevel Bella Luna speakers?
You could put a soft-foam hemi-sphere on the top for style and diffraction control. You could cut up a soft-foam water pipe insulator and glue to the top bass cabinet edges for diffraction control.
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I would recommend that the central disk be extended out to the edge of the sphere and the expansion for the HF section be mirrored for the upper and central section. At the base frequencies, the short expansion is of little consequence. Also, the complex taper of the disk will not do anything at low frequency, so it should be modeled as a slot loaded bandpass. Done right you may be able to get away with a simple first order electrical crossover.
When i 1st saw the render i to thot of the Duevel, but it uses to curved surfaces to make a radial horn, in the orb it looks like it is a reflector so much more akin to the upward firing reflector “omni” that Electrohome and others made during the 60s(?). But a 2-way in a more interesting shape.
One thing i did note is that the enclosure volumes for the 2 drivers will be about the same, while it would usually be the case that the majority of the volume might be better used by the woofer. Hoffman’s Iron Law might also play a role.
dave
One thing i did note is that the enclosure volumes for the 2 drivers will be about the same, while it would usually be the case that the majority of the volume might be better used by the woofer. Hoffman’s Iron Law might also play a role.
dave
Thanks guys, I enjoying reading your ideas and insights.
For me it’s part aesthetics and function and performance. I am getting into the design and use DSP to help with the physical limitations in my designs.
Your help is very much appreciated and look forward to designing this one which if successful will be available for others to build.
For me it’s part aesthetics and function and performance. I am getting into the design and use DSP to help with the physical limitations in my designs.
Your help is very much appreciated and look forward to designing this one which if successful will be available for others to build.
yeah will widen for sure, but you'll have big ripples in the response which will be dependant on location, so they can't be fixed with DSP... Just have a look at the "accoustic horn design the easy way" thread if you want to see how smooth a horn CAN be
How audible are high frequency ripples? There will be a lot of interference from two omnidirectional speakers in a room.
I think the difference is the timescale. one is occuring within 1-2 ms and the other on the order of 10+ ms
the people advocating for the low diffraction designs have found that only that really early stuff really matters.
the people advocating for the low diffraction designs have found that only that really early stuff really matters.
Admittedly, diffraction was (just) one of my earlier thoughts but the more I look at it, the less obvious the effects look like they might be.
Drofdissonance, show me a speaker that diffracts at +10ms 😀 Regarding your comment on it not mattering, I think it is desirable for these later reflections to be diffuse, balanced and in step with the direct sound.
Drofdissonance, show me a speaker that diffracts at +10ms 😀 Regarding your comment on it not mattering, I think it is desirable for these later reflections to be diffuse, balanced and in step with the direct sound.
I,m a bit of a noob to technical speaker design and using software. I need to learn.
I have a cross section to show the horn design. Let me know what are the benefits and shortfalls of this.
