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Multi-Way Conventional loudspeakers with crossovers

3d Printed acoustic lens, XT25, Thingiverse
3d Printed acoustic lens, XT25, Thingiverse
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Old 5th July 2017, 06:07 AM   #1
Megalomaniac is offline Megalomaniac  United States
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Default 3d Printed acoustic lens, XT25, Thingiverse

Design credit goes to Shankenstein from Thingiverse.

I 3D printed with a FlashForge 3d Printer Creator Pro

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Old 5th July 2017, 06:08 AM   #2
Megalomaniac is offline Megalomaniac  United States
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I used ABS plastic with 10% infill, full support.

I also just printed one, because I am taking Patrick Batemans advice and will run a tweeter mono

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Last edited by Megalomaniac; 5th July 2017 at 06:13 AM.
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Old 5th July 2017, 10:14 AM   #3
wesayso is offline wesayso  Netherlands
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Would be fun to print this shape with something like Bronzefill and polish it after printing! It would make it 3x the weight of regular PLA and make it look good too!
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Old 5th July 2017, 12:38 PM   #4
4real is offline 4real  Netherlands
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Looks cool! I've read somewhere that actually a phase plug is not the most ideal option for such a lens. A flat tweeter is supposed to work better.

How did you come up with the design details? Just a wild guess of are there any actual calculations behind it?

Would be interested to see some measurements!
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Old 5th July 2017, 01:11 PM   #5
Megalomaniac is offline Megalomaniac  United States
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Quote:
Originally Posted by 4real View Post
Looks cool! I've read somewhere that actually a phase plug is not the most ideal option for such a lens. A flat tweeter is supposed to work better.

How did you come up with the design details? Just a wild guess of are there any actual calculations behind it?

Would be interested to see some measurements!
Waveguide - Vifa XT25 found on #Thingiverse https://www.thingiverse.com/thing:932179

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Old 5th July 2017, 01:13 PM   #6
Megalomaniac is offline Megalomaniac  United States
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End plan is to run the tweeter from 6khz or 10khz and up. This design supposedly flattens power response

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Old 5th July 2017, 03:14 PM   #7
4real is offline 4real  Netherlands
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Hmm, looks like there is no real "hard" science behind this thing then (except for the concept of the lens)? That does not mean it is not an effective device tough
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Old 5th July 2017, 04:01 PM   #8
Megalomaniac is offline Megalomaniac  United States
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Quote:
Originally Posted by 4real View Post
Hmm, looks like there is no real "hard" science behind this thing then (except for the concept of the lens)? That does not mean it is not an effective device tough
The science is the height of the hollowed area is proportional to the diameter of the tweeter. Without a ring radiator the beam would only be as wide as the diameter will allow, it would beam 13,500hz, that's only if it's right in front of you, a 1" sweet spot. The ring radiator would effectively reduce the breakup at the top. Since I'm using it as a super tweeter, mono, and center of dash. I'm hoping I can reduce reflections from the side with treatment on the pillars, and the lens restricts longitudinal dispersion.

If I'm observing from the x plane looking at the zy plane, I want to narrow z(height) and maintain y(width). But if you squeeze z y responds like squishing a ball. So you must use treatment to correct. A parametric eq ain't gonna help just like 🙌🙏

So basically I'm anticipating a bigass baffle is just going to be not helpful and impede my view

I hope my take on this is not skewed

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Old 5th July 2017, 04:02 PM   #9
Megalomaniac is offline Megalomaniac  United States
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Wait till I add the midranges drivers in an ambio setup. This will be interesting especially in a vehicle

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Old 5th July 2017, 06:01 PM   #10
4real is offline 4real  Netherlands
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Originally Posted by Megalomaniac View Post
The science is the height of the hollowed area is proportional to the diameter of the tweeter. Without a ring radiator the beam would only be as wide as the diameter will allow, it would beam 13,500hz, that's only if it's right in front of you, a 1" sweet spot. The ring radiator would effectively reduce the breakup at the top. Since I'm using it as a super tweeter, mono, and center of dash. I'm hoping I can reduce reflections from the side with treatment on the pillars, and the lens restricts longitudinal dispersion.
I get the science of the design concept, that is not nu question. My question is if this thing was specifically made for this tweeter? Where did the dimensions come from?
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Last edited by 4real; 5th July 2017 at 06:05 PM.
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