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BG NEO 3 FR optimization
BG NEO 3 FR optimization
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Old 24th October 2017, 03:34 PM   #21
Chris8sirhC is offline Chris8sirhC  United States
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Any more progress with this concept?
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Old 28th November 2017, 07:16 AM   #22
ErikdeBest is online now ErikdeBest  Switzerland
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BG NEO 3 FR optimization
Pity I do not have 3D printing.

Very interesting results indeed. And, did you have the chance to measure off axis response as well?
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Old 5th December 2017, 08:25 PM   #23
Juhazi is offline Juhazi  Finland
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I just noticed this thread - I must try that trick too! I don't have access to 3D printing, so i takes some time to realize...

These measurements were at 1,5 meters and driver open back, turned 90¤ sideways (vertical directivity)
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File Type: png neo3pdr hor 015 30 45 60 75 90¤ 5ms 112.png (93.0 KB, 470 views)
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Old 9th December 2017, 08:54 PM   #24
Andersonix is offline Andersonix  Sweden
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BG NEO 3 FR optimization
To get started one would not need actual 3D printed parts, as it appears a half round molding of the correct size would work, or even using rope caulk or other hand-moldable squishy materials.
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Old 15th December 2017, 10:10 PM   #25
bolserst is offline bolserst  United States
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Quote:
Originally Posted by Juhazi View Post
These measurements were at 1,5 meters and driver open back, turned 90¤ sideways (vertical directivity)
Thanks for sharing your measurements.
This seems to confirm my thought that the measurements shown in post #1 are near field measurements.
I'm not sure how much response smoothing you will see at 1.5m from the addition of the half-round bars.
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Old 29th December 2017, 09:36 AM   #26
dheming is offline dheming  United States
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If simple half-rounds help that much I wonder what full waveguides at each individual opening would do? Like this:

Click the image to open in full size.

BG NEO 3 FR optimization-catenary_waveguide_01-rh-jpg

All the curves are catenary in this 3D model. Should be easy enough to get 3D printed somewhere. I did the layout work from an image, but I have a pair of older Neo3-PDR tweeters in storage that I could get accurate measurements from using calipers.
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File Type: jpg Catenary_Waveguide_01-RH.jpg (168.6 KB, 346 views)
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Old 30th December 2017, 05:40 PM   #27
gentlevoice is offline gentlevoice  Denmark
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BG NEO 3 FR optimization
Hi all,

Quote:
Pity I do not have 3D printing.
Just FYI Shapeways does 3D printing at an IMHO quite reasonable price. Their "frosted detail" materials is high precision and have a very smooth surface. Shapeways can use a variety of files formats and among those .stl files.

Frosted (Ultra) Detail Plastic 3D Printing Material Information - Shapeways

Cheers,

Jesper
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Old 31st December 2017, 12:14 AM   #28
dheming is offline dheming  United States
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Quote:
Originally Posted by gentlevoice View Post
Hi all,



Just FYI Shapeways does 3D printing at an IMHO quite reasonable price. Their "frosted detail" materials is high precision and have a very smooth surface. Shapeways can use a variety of files formats and among those .stl files.

Frosted (Ultra) Detail Plastic 3D Printing Material Information - Shapeways

Cheers,

Jesper
Indeed, Shapeways is a great company that gets things done promptly and they're very competent. I recently had a small water flowform model printed in SLS (Selective Laser Sintering) by them and it came out great. Bead blasting/polishing was only $2 extra.
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Old 1st January 2018, 06:21 AM   #29
gentlevoice is offline gentlevoice  Denmark
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BG NEO 3 FR optimization
Hi ...

Quote:
Indeed, Shapeways is a great company that gets things done promptly and they're very competent. I recently had a small water flowform model printed in SLS (Selective Laser Sintering) by them and it came out great. Bead blasting/polishing was only $2 extra.
I have also mostly had very good experiences with Shapeways. Only when I ordered a very high resolution shape did the "frosted detail" print process introduce subtle relative spacing errors. However, when contacting Shapeways' customer service about it I had a very helpful reply. My preferred 3D print service.

Jesper
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Old 2nd January 2018, 09:08 AM   #30
Fjendbo is online now Fjendbo  Denmark
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Quote:
Originally Posted by dheming View Post
If simple half-rounds help that much I wonder what full waveguides at each individual opening would do? Like this:

Click the image to open in full size.

Click the image to open in full size.

All the curves are catenary in this 3D model. Should be easy enough to get 3D printed somewhere. I did the layout work from an image, but I have a pair of older Neo3-PDR tweeters in storage that I could get accurate measurements from using calipers.
Hi,

Would you mind sharing your 3D model in a format Cura 3D can handle? I have a Neo3 project on the way and would love to try it out!
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