3D printed audio stuff (with STL files)

[pelanj]

I got into 3D printing and I think I have started already too many threads here, so I am starting this one to share my 3D printed audio stuff.

The first one is a back cover for BC 8PE21. I printed it with only 11% infill to use some leftover filament, for strength I think it would need more. Also, the strength could be improved by adding ribs - especially on the flat part, the sides seem OK. Its intended use is for using the 8PE21 with a RCF H6000 horn or with the 135 Hz midbass horn by John Inlow. It fits the driver fine. For me, making one from wood would be a nightmare. 3D printing is easy

Edit: Here is the index of the posted models from page 2 on:
Post #17: Mount piece for Visaton FRS8M (by arcgotic) 3D printed audio stuff (with STL files)
Post #25: 20 cm paraline (not the best design, for experimenters only) 3D printed audio stuff (with STL files)
Post #61 Screw in driver to 3" diameter two screw bolt on (may not work for all drivers) 3D printed audio stuff (with STL files)
Post #65 8PE21 front aperture 3D printed audio stuff (with STL files)
Post #101 34c9 base 3D printed audio stuff (with STL files)

Some more K-tubes: https://www.diyaudio.com/community/threads/3d-printed-audio-stuff-with-stl-files.349459/post-6890665

 

[1hiep0]

Hi Pelanj, any update K-Tube stl? Thanks

 

[pelanj]

I have some more I made. When I get home, I will post them all here.

 

[pelanj]

So as promised, here is my collection of K-tubes (larger, smaller, bent and with a dual slot) and the miniKlam - if anyone would like to experiment with these. They are all meant for dual M5 screw mounting on 3" diameter.

I think especially the dual slot version is quite interesting. These are featured in these two threads:

Combining a 2" exit driver with a HF unit as a point source. Is it possible?

3D printed K-Tube for 1" compression drivers

 

[pelanj]

Here is an experimental MDD tweeter attachment (meant to be aimed up, using diffraction for 360 degrees dispersion) - not tested yet, but the print was OK.

 

[pelanj]

And the last one for today, a 5 mm thick distance ring for mounting the 8PE21 on the H6000 horn. The H6000 are now being drilled and tapped for driver mounting, the ring fits the front gasket really well.

 

[pelanj]

Working on a 3D printed Paraline with 20 cm slot length, 5 mm layer thickness and ca 50 degrees dispersion. I always wanted to try one, so i will try to print one

 

[xrk971]

I got into 3D printing and I think I have started already too many threads here, so I am starting this one to share my 3D printed audio stuff.

The first one is a back cover for BC 8PE21. I printed it with only 11% infill to use some leftover filament, for strength I think it would need more. Also, the strength could be improved by adding ribs - especially on the flat part, the sides seem OK. Its intended use is for using the 8PE21 with a RCF H6000 horn or with the 135 Hz midbass horn by John Inlow. It fits the driver fine. For me, making one from wood would be a nightmare. 3D printing is easy

Did you know that exposed porous infill can be used as self damping material? Basically printed reticulated “foam”. You can make a rough surface with pointed cones as an absorber under the foam.

 

[pelanj]

I think I saw that idea here before - most probably posted by you What would be the use for that? And I think I am not that good with Slic3r to actually do this.

 

[xrk971]

Imagine not having to add eggcrate foam to the inside of your speaker boxes. Or making speaker box walls that are natively sound absorbent - you are making acoustically engineered material and structure all in one. When 2 things can be done in one step, why not?

 

[ErikdeBest]

Subscribed!

 

[freddi]

hey pelanj - if in pairs, which do you think would be the most fun for me -dual slot K-tube? - or the mini-Klam?

 

[pelanj]

The mini-Klam did not measure too well but maybe it was just me and my not too perfect measurement techniques - and I most probably also measured in the wrong plane - I need to revisit that one day, since DonVK's sims of the K-tube were eye opening. Also, since it is easy to 3D print anything, I would make it round next time. I do jot think that the prismatic shape could bring any gain acoustically.

I would highly recommend the dual slot one - the dispersion was symmetrical and it measured quite well. And you showed me some posts here that a member here is actually using dual slot K-tubes - and I can understand why - but I yet have to print the second one...

I wonder if there could be any gain to have a Paraline-like device with a K-slot or if the K-Tube could be folded flat in a similar way. Or it it was even possible or made any sense at all.

 

[pelanj]

As a teaser, these are the parts that will be printed during the next few days. It will be a bit of a challenge because I got some warping on my prints lately and these are amost across the whole bed. I think my nozzle moved a slight bit higher during a power loss incident and therefore my settings that worked before do not work that good anymore. I was able to solve that with brim-like supports included into the models, but I would like to print as it is now to test how the autolevel function actually works and if it even works in my version of firmware.

Also, some, if not all chamfers are not technically correct for the paraline, I just made them by feeling and what my 3D skills permitted. If the prints turn out nice and flat, I will apply Revell plasto to the inner surfaces, with a bit of sanding and a layer of spray paint, I can get almost mirror quality finish.

If the prints will be warped despite all precautions, I will just try to screw them together and heat up by a heat gun to try to iron them out. That is going to be fun

 

[arcgotic]

Can we post .stl files of our projects in this thread?

 

[pelanj]

You are welcome to do that. The more models we have here the better

 

[arcgotic]

Here is a mount piece for Visaton FRS8M. I will use it on the B52 horn (4 of them).

 

[pelanj]

Very nice! Could you please link the horn as well? Thanks.

 

[barackuda]

hello pelanj
I have 3 of those horns its a copy of the venerable QSC horn.

B-52 PHRN-1014 1" Horn 10" x 14" Bolt-On

also thinking about some sinergy horns for my living room Ht setup with three of these as LCR

 

[xrk971]

Warping on large prints has to do with the temperature vs lay down speed profiles. I had this once and did some research online. What helped was slowing down the speed of filament deposit to allow more time to cool slowly so stress is relieved. Not using a cooling fan to blow on the molten deposited filament helped a lot. Keeping bed heater warmer helped too. It takes a lot of trial and error. That’s the worse thing about 3D prints. It’s a time waster if you change something like filament brand or print size or print speed.