I am more than happy to do so, but at this moment I am completely stuck even getting a waveguide out of that software program 🙁
btw, I personally think the Tymphany mini tweeters are better.
Also have a lower Fs.
But just don't know what is gonna happen. It seems they are just go into full bulk mode, except for a few products 🙁
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Now that I've nailed down the T25B waveguides, I have a T25A on hand to measure on this group of waveguides to see how it does also. Final designs will include both circular and elliptical mouth waveguides.
Then I would like to move on to the T34B, so if anyone has one they would be willing to let work with, that would be great!
Then I would like to move on to the T34B, so if anyone has one they would be willing to let work with, that would be great!
have you looked through this thread yet? Pida has a design he already used in his 3 way
New project: Bliesma T34B in WG, 18WE, 32W
nanou64000> I share all my designs at my website
profiguy> yep I check in on that thread every now and then. It was one reason I was encouraged to try the T34, previously I thought the dome too big to work well so hadn't considered it. I'll being creating at least a 6.5" and 8" variant, elliptical and circular mouth. This will complement my T25 designs well because I only went as large as 6.5" for that tweeter given the natural rolloff won't allow it to play very low anyway.
profiguy> yep I check in on that thread every now and then. It was one reason I was encouraged to try the T34, previously I thought the dome too big to work well so hadn't considered it. I'll being creating at least a 6.5" and 8" variant, elliptical and circular mouth. This will complement my T25 designs well because I only went as large as 6.5" for that tweeter given the natural rolloff won't allow it to play very low anyway.
nanou64000> I need to clarify: when comparing elliptical to circular, I make the better one available to download. In the case of the T25B, I didn't think the circular was better, just different, and it seemed something between circular and 1:0.618 aspect ratio elliptical would be best. I investigated that a few posts back with a 1:0.8 and 1:0.68 aspect ratio and the 1:0.68 seemed the best of all, so that is what I made available. Different tweeters respond differently, so some have the circular version available and some don't.
Hi Brandon: will you be including a 5-inch waveguide among those that you attempt for the T34?
In the context of the reduced C2C-distance speaker designs that I have been working on, I prefer tweeters that can be used with lower crossover frequencies yet have small faceplate heights.
So far the most suitable tweeter for such applications has turned out to be the Wavecor TW030WA11 / TW030WA12 (which have 115mm / 4.53-inch Ø faceplates), but it would be good to have alternatives.
http://www.wavecor.com/TW030WA11_12_specifications.pdf
In the context of the reduced C2C-distance speaker designs that I have been working on, I prefer tweeters that can be used with lower crossover frequencies yet have small faceplate heights.
So far the most suitable tweeter for such applications has turned out to be the Wavecor TW030WA11 / TW030WA12 (which have 115mm / 4.53-inch Ø faceplates), but it would be good to have alternatives.
http://www.wavecor.com/TW030WA11_12_specifications.pdf
jcarr> no, because if you use a 5" waveguide, it must be crossed higher than a 6.5" (clearly), and if you are crossing higher, use the T25. You'll be in its comfort zone and almost certainly have better top octave performance as IME big domes on small waveguides tend to have real top octave problems.
OK, thank you for your response.
FWIW, I haven't noticed any unusual issues with the TW030WA11 / TW030WA12's top octave response or CSD time. Nothing that can't be cured with a bit of judicial equalization in the crossover.
FWIW, I haven't noticed any unusual issues with the TW030WA11 / TW030WA12's top octave response or CSD time. Nothing that can't be cured with a bit of judicial equalization in the crossover.
Interesting they get decent response with basically a conical waveguide and fabric dome. I tried conical very early on and it wasn't good, but that was with metal domes. I should revisit the conical idea for the fabric domes I've been testing here. Maybe that is the way to go with fabric domes.
Ok thanks, I had read your different tests with aspect ratio but I missed your conclusion. Now I understand what is on your website.
Going forward I'm thinking about posting .3MF instead of .STL files. They have the units included so there is no confusion if the design is in inches or mm. Also this format apparently reduces the weird intersecting manifold problems that some printers' websites choke on when you upload a .stl file. Anyone see any issue with this? I think most slicers can handle .3MF just fine?
I’m having some trouble getting good definition on the ring interfacing with the tweeter, does anybody have feedback on the best practice here, or guidance on how good it needs to be? An image of my progress is here: 3D print trial - Album on Imgur
It doesn't look like any support material is being laid down first under the lip. Which tweeter is this for?
Still, it looks like a slicer issue. That layer is not being laid down on the support well, like it doesn't even touch the support material. And there was support under that entire lip, not just part?
The support material was maybe a bit sparse, but it did touch the whole surface.
I've edited the design and I'm going to see if I can change the alignment pins to holes of short dowels to be placed after printing. I'm also working with some friends with more 3D printing experience to see if I have a calibration issue.
I may end up changing the compression ring to a separate piece of shim stock. Do you know how sensitive these waveguides are with respect to errors in the axial dimension?
I've edited the design and I'm going to see if I can change the alignment pins to holes of short dowels to be placed after printing. I'm also working with some friends with more 3D printing experience to see if I have a calibration issue.
I may end up changing the compression ring to a separate piece of shim stock. Do you know how sensitive these waveguides are with respect to errors in the axial dimension?
They actually are pretty sensitive to axial displacement. REmoving the pins would allow the lip to print directly to the bed so that should help.