ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Finally found some time for this little project.
Very happy with the result. Next is BL4000.
"You think we can slap some oak on this thing?"
Thanks... No surface treatment yet.
Our dining table + coffee table (same room) is also in oak.
I usually sand them and treat them with soap (without pigmentation).
My plan is to do the same with these slats.
I am currently printing the first prototype. My speakers are black/black and my plan is to leave the original fret on the speakers and mount the slats on top.
very nice project, looks fantastic.But irritating question:
could artificially added lamellas have bad influence on sound presentation of speakers, which were not designed to have them?
My plan keeping the original cover beneath the slats did not turn out very well. I changed the approach. The 3D printed part 'snaps' around the edge of the speaker and into the metal clip holding the original cover in place.
No glue, no screws ...
I do not notice any sound difference... but there is surely someone out there with a more 'educated' answer ...
Lovely job. Top class work. I’m currently modifying my Beolab 1 tower speakers. I wanted to do the same thing that your doing with your grills, but instead of using wooden fins, I was going to have chrome metal fins. Any chance you could help me create the 3D printed plastic brackets for my speakers?
Here are my current Beolab 1 mods (not finished yet) https://www.audiocircle.com/index.php?topic=177883.0
Hi,
Metal chrome fins ... I think it will look absolutely great.
The process I have shown above is a bit simplified. Draw, print, assemble => perfect result.
Honestly ... it's not like that. I probably made 3-4 prototypes of the 3D printed part for each speaker before I was happy with the result.After having finished the first BL4000 I made improvements before I finished the remaining 3.
Without having the speaker and the fins physically present, I cannot draw and print any bracket.
The oak fins are mounted without any glue, screws or adhesive tape. No modification to the speaker either. It is just a tight fit and the surface of the oak has enough friction or texture to hold them in place. That will be difficult with metal / chrome finish.
Ravsted,
I took my Beolab 1 grilles apart and drew around a bracket with a very fine pencil. In addition to that I added imaginary ‘fins’ to the image (equally spaced apart). The overall diagram is extremely precise. Unfortunately the Beoworld website does not allow me to display or send images. Do you have an email address for me to send it to you?
Click on 'Media' in the top navigation bar on this page and click on 'upload' ...
It’s not letting upload it whether I use my IPad or Mac Laptop. Instead I have uploaded it to the following Audiocircle page for you to see…
https://www.audiocircle.com/index.php?topic=177883.new#new
Luckily my Windows 10 PC is able to transfer the image of the Beolab 1 bracket. Here it is below...
I will not print and ship any brackets to you. But I will offer you to create a STL file you can give someone who can 3D print for you. There are also services online where you upload your STL file and they will print it for you.
The Fin Lines in the image are precisely spaced apart, and are positioned in place to give us both a rough idea what they will look like.
I am going to be using 4mm thick, 10mm width aluminium bars for the speaker grill fins.
The drawing I sent you is extremely precise (16.45CM INNER WIDTH, 16.8CM OUTER WIDTH).
The original grill uses ‘rubber stickers’ attached to the inside of the bracket.
There are protruding plastic hooks attached to the front speaker baffle, which the grille itself simply slots onto.
I would like the aluminium fins to slot into place (no screws).
Here is some images I found on Google to help give you some ideas...
OK... let me summarize. Please confirm.
Outer width: 168 mm
Inner width: 164,5 mm.
Fins: I will add fins to the sides, to avoid any wide open gab. 4 mm x 10 mm. The aluminium bars with come with a tolerance e.g. +/- 0,1 mm. I suggest a spacing between the fins of 6 mm. I suggest to make slots for the fins (as mine above). Width will be 4 mm, but with an opening of only 3,5 mm. I suggest they will be 5 mm. deep. They will be flexible (as mine above). When you sqeeze the aluminium bars in the opening of 3,5 mm. it will expand to 4 mm. But I cannot tell if they can hold the weight of the fins. You might need to put som glue (or thick double adhesive tape) in the buttom of the slots.
I suggest height of the bracket to be 3 cm. The width of the bracket is 16,8. What is the depth ? You can print as many as you want to get proper stability. I think 1 per 30 cm. will be fine.
Based on your info the wall thickness of the bracket will be 1,75 mm.
I find your drawing "thicker". Never the less I have made a first 3D drawing and exported to .DOCX
Outer dimension is 168 x 56 mm
Wall thickness is 1,75 mm giving inner dimension 164,5
You should be able to print the A4 document and check.
If you are happy so far I can add the slots for the fins.
Link
Please look at the last image above to see how tall the bracket is.
Your recommended spacing of 6mm between each fin is good.
The slot spaces you recommend are good.
If I was to draw an overhead view of the bracket it would measure 3cm as you recommended.
OK
Please print this #A4 Document# with a precise cross section and check against current bracket and speaker. I guess the curve doesn't have to match 100% as no one can tell when the fins are there.
As you can see in the image above, I superimposed your image over the top of mine. Looks pretty good. getting there.
What is ment by 'thicker' lines required?
With the inner and outer width you specified the thickness (of the two legs) will only be 1.75 mm.
If you want them thicker either inner or outer width must be changed.
164.50 + 1.75 + 1.75 = 168.00
Ok just ignore the thicker line comment
OK... we now have the "contour" in place. This is as good as it gets. I will add slots for the fins later... and some additional "walls" to make it more rigid. Similar to those in your drawing.
Looking good
Great job, Ravsted
Vähintään yhdeksänkymmentä prosenttia suomalainen!
Final drawings.
3 to choose from. If there is room... go for the strongest. I will create the STL file when I know which one you choose.
This is how it will look with the 4x10 aluminium
I like the ‘second one’ from the top
Looking forward to see the result. Remember to share it with all of us.
I will recommend these print settings.
Material: PLA MAX or PETG
Infill: 100%
Support: No
I have asked Santa to give me a pair of black Beolab 1's for xmas... We'll see. Maybe I will be able to reuse these brackets and sqeeze in some nice oak fins/lamella/slats.
Incredible work! Ok I will keep you posted. By the way, you will fall in love with the Beolab 1’s
Is there any chance that I could pay you to print just ‘ONE’ Bracket for me to test on my Beolab 1’s, just to make sure that it definitely fits?