Cross-posting across forums, mostly due to vanity.
It started with this idea, which I had no way to build until a friend set up a CNC:
The CNC bits turned out pretty good. My router and finish work, not so much. But still, I like the way it's looking:
Measurements aren't that great yet.
I was hoping the Neo3's 7.5kHz notch would be reduced further. There's a bit of a gap between the sides of the tweeter and the baffle, and I'll try filling that with some kind of foam gasket. Maybe that's causing it to act like a 'nude' driver at higher frequencies.
It started with this idea, which I had no way to build until a friend set up a CNC:
The CNC bits turned out pretty good. My router and finish work, not so much. But still, I like the way it's looking:
Measurements aren't that great yet.
I was hoping the Neo3's 7.5kHz notch would be reduced further. There's a bit of a gap between the sides of the tweeter and the baffle, and I'll try filling that with some kind of foam gasket. Maybe that's causing it to act like a 'nude' driver at higher frequencies.
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I cross to a sealed subwoofer at 60-80Hz, and with that, it's adequate. Without a sub, I can get it down to maybe 50Hz with a lot of EQ and help from the room, but it drops off below that.
Don't know yet 🙂 If I had the construction skills, I'd have tried a magnet mount design.
By small, are you talking about the thickness of the 'spine' piece? The woofer panel will be moving front-to-back. I could see the brace flexing sideways, but I'm hoping it'll be pretty stiff front-to-back. Or maybe that's not how it works.
By small, are you talking about the thickness of the 'spine' piece? The woofer panel will be moving front-to-back. I could see the brace flexing sideways, but I'm hoping it'll be pretty stiff front-to-back. Or maybe that's not how it works.
Love the design. Maybe its just me but the back brace looks a bit light for those sizes of drivers. I would think that vibration will be transfering through those small panels once you get the sound pumping. Maybe I'm wrong.
I think the only thing I would be worried about would be the movement of the bass driver shaking the top panel forwards and backwards. As far as I know the Orion suffers quite badly from this, unless LW has changed the design.
How would I test for that? With previous designs I could feel the top panel vibrating when the mid and tweeter were muted and the woofer was playing. I guess I could check that on this one too. I cross to a subwoofer at ~80Hz, and it's a relatively small room, so the woofers aren't seeing a lot of excursion.
What changes would you or GOWA suggest to reduce the transmitted vibrations? I think I'll rebuild the 'final' version using IKEA butcherblock or something, so all the pieces would probably be 1" or 1 1/8" thick, including the spine. Should I add bracing somewhere? Magnet mount the midrange with some rubber to decouple it? I'm not sure how to approach something like that. And I'm not sure that will work, that would require the spine to move while the MT panel stays still, which would require a really heavy MT panel, I think? Maybe separate supports for the MT and woofer panels?
What changes would you or GOWA suggest to reduce the transmitted vibrations? I think I'll rebuild the 'final' version using IKEA butcherblock or something, so all the pieces would probably be 1" or 1 1/8" thick, including the spine. Should I add bracing somewhere? Magnet mount the midrange with some rubber to decouple it? I'm not sure how to approach something like that. And I'm not sure that will work, that would require the spine to move while the MT panel stays still, which would require a really heavy MT panel, I think? Maybe separate supports for the MT and woofer panels?
The woofer's brace ought to be decoupled from the top driver's brace. I'm running some OBs too and I can feel the woofer's vibration on the mid's cone.
Thanks. Compared to the previous design, primarily aesthetics 🙂 I'm using the same drivers, same crossover points, almost the same baffle widths. I wanted to put a small baffle around the tweeter to see if I could reduce the dipole null without affecting the off-axis response too much. I still have experiments to try with felt, dowels / half-rounds, etc. to see how they affect the response.
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