What about making a compression cavity there? Instead of a moving wall only some apertures in a fixed wall and the moving diaphragm just beneath. But I have no idea of the bandwidth reachable this way. The apertures could be positioned closer to the throat, I would think.
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Where is the drawback using a coax compression driver? They do combine both sources in the pure pressure area before any expansion. There are some good out there and 400Hz easily reachable as I showed with my dcx 464. Of course a free choice of hf and mf driver would be nice. But is the benefit worth the work?
I think mainly if you want a coaxial source that goes down to 300, 200, or whatever arbitrary lower frequency. Although you raise a good point, is it really worth it to go to the trouble if a coax compression driver would otherwise be good enough.
It's called DIY, an enjoyable activity, for some 🙂
Based on what I've seen, the HF outputs of coaxial compression drivers still leave a lot to be desired. I would be interested in how clean a MEH design can be. The moving wall seems like a good idea to me (if not moving too much), and a moving wall beneath a thin perforated cover perhaps even better. It all comes down to how clean HF response it would provide. If not better than the other solutions, than it's probably not worth the effort. Are you not interested to try?
Based on what I've seen, the HF outputs of coaxial compression drivers still leave a lot to be desired. I would be interested in how clean a MEH design can be. The moving wall seems like a good idea to me (if not moving too much), and a moving wall beneath a thin perforated cover perhaps even better. It all comes down to how clean HF response it would provide. If not better than the other solutions, than it's probably not worth the effort. Are you not interested to try?
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Mabat has a good point, for a professional deployment that’s a tool for making money then it makes sense to use an of the shelf working solution.
For diy me personally its a challenge to squeeze as much performance out of cheaper components and experiments.
For diy me personally its a challenge to squeeze as much performance out of cheaper components and experiments.
Well the sad truth is that in the end one often spends a lot more than if bought something "good enough" right away. But that's a too simple consideration 🙂
Shhhhhh, we can’t admit this.
“Somebody” might find out.
“Somebody” might find out.
Besides, with 3D printing at hand, it can all have pretty wild shapes. I already have some fantasies... 🙂
- To me the "task" now is how to improve further what I already have. What's the next step... A better phase plug, a MEH? Maybe it would be a coaxial CD, I don't know.
- To me the "task" now is how to improve further what I already have. What's the next step... A better phase plug, a MEH? Maybe it would be a coaxial CD, I don't know.
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On the subject of silly DIY ideas😏... How stiff do you think the walls of the waveguide need to be?
Been contemplating an inflatable or foldable waveguide for portable (ie. packs up very small for transport) bluetooth speaker on steroids.
Been contemplating an inflatable or foldable waveguide for portable (ie. packs up very small for transport) bluetooth speaker on steroids.
Simple rule is that they should not vibrate and make sound, although perhaps vibration doesn't matter if the transportability is priority number one. Just "regular print" I did vibrates audibly, and had to dampen it. Perhaps you can have backup plan: in case your foldable / inflatable waveguide has too much of a problem with it, there is possibility to add dampening somehow.
So we have super stiff/damped Magico that some don't like and BBC approch of vibrating front panel but rest walls are damping the front. Which one you like more? You can print now ABS+GF or hard TPU and tell us.
https://eu.store.bambulab.com/en-pl/products/abs-gf
https://eu.store.bambulab.com/en-pl/products/abs-gf
Lavoce DF10.171K (A520G2/25-STD-1).
Given the price (62 EUR/piece), it's just perfect.
It will be virtually the same in A460G2.
Given the price (62 EUR/piece), it's just perfect.
It will be virtually the same in A460G2.
That's astonishing- literally no eq required. This needs an audition. £38.40 in UK
https://speakershop.bluearan.co.uk/...55W_8_Ohm_Compression_Driver&id=LAVDF10171KAF
https://speakershop.bluearan.co.uk/...55W_8_Ohm_Compression_Driver&id=LAVDF10171KAF
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