Hey Brandon! Good to hear from you!
Any news on the speaker family with your waveguides?
Cheers!
Kind of slowed at the moment with school and work. I may take some vacation soon and build the final design and start working on a crossover.
Great! Life always gets in the middle of our hobby!
Good luck and thanks for sharing your work!
You may consider doing something like what I did to get a true 6.5in from the elliptic waveguide. I changed the outer to a circle so that I could route easier and mate as close as possible to my midrange driver. iirc I took the 5in and set my outer to 5.25in, could have easily done 5in.
Unfortunately I'm visualizer. And what's worse, speakers have to be accepted by my wife too because speakers will be installed in our sitting-room. I'm thinking about carving your "6.5x1.1 83 A T34 v2" waveguide directly in MDF. It looks good on visualization if driver flange is removed. But I don't know if carpenter will be able to do it on CNC machine using stl/step file. I have to ask him.
Hi jaakkopetteri,
The impact of doing this is shown in post #409 of the thread in the German forum (here the advantage of having no surrounding, i.e. the dome membrane close to the WG-throat and post #464 showing the impact of 'steps' from 1mm to 5mm when fitting a real world dome tweeter with a surrounding to the WG-throat.
Feel free to come back with questions, I'll be happy to check the old simulations if helpful. I might need some days to answer though.
Sorry for replyng that late. Fluid is right, i.e. I did theses simulations using ABEC and used conditions quite comparable to what fluid is suggesting for simulating with AKABAK:
I definitely used acceleration to drive the diaphragm, i.e. no LEM-part. Only half the surround was driven (although with 100%) the outer half of the surround was not driven at all. I think Fluids method refines the model and I'd recommend to use it as suggested.
I'd second that as well. From my simulations I learned, that very important topics during alignement of a dome to a waveguide are to (i) bring the throat close to the surrounding, (ii) check the width of the surrounding and add a short step with a height around the width of the surrounding.
The impact of doing this is shown in post #409 of the thread in the German forum (here the advantage of having no surrounding, i.e. the dome membrane close to the WG-throat and post #464 showing the impact of 'steps' from 1mm to 5mm when fitting a real world dome tweeter with a surrounding to the WG-throat.
Feel free to come back with questions, I'll be happy to check the old simulations if helpful. I might need some days to answer though.
Was there a 6.5" round guide for the SB29RDAC?
What was the nicest response 6.5" round SB fabric combo?
What was the nicest response 6.5" round SB fabric combo?
I remember this has been asked before in this thread, but may I once again kindly ask for DXT stepped waveguide simulation and experiments? More practical information provided by member Gaga here:https://www.diyaudio.com/community/threads/dxt-wave-guide-dimensions.334739/
Hello fluid, Thanks. I am aware of those. Strickly speaking I would wish for a DXT printing file for the Vifa XT25 ringradiator.
Consider this a Dear Santa etc etc. thing..
Consider this a Dear Santa etc etc. thing..
Is the drawing in that post accurate? I could try to make that and see how it measures. You probably won't have much luck simulating a fabric ring radiator, but I do have a Scanspeak ring radiator on hand to measure.
I didn't have much luck with the SB29 early on, but should probably circle back to it. If I design something, I'll post the .stl and you can try it out.
Hi Boden,
For your convenience the numbers used for the xls-figure:
D/2 = half diameter
H = height
Same numbers as applied for the xls figure you posted above with adjutsed x- and y- axis values.
Please note that the DXT waveguide has been optimized fot the applied dome tweeter (see impact of step 1 on the directivity here).
Using the Vifa XT25 ringradiator for the DXT-profile might change the directivity at high freququnecies. Might be seen by a respective simulation and adaptd accordingly. You'll be on the safe side if you use the dome tweeter used by seas (information available somewhere, just don't have it at hands actually).
Good luck and please post the results in case you proceed with the project....
For your convenience the numbers used for the xls-figure:
D/2 = half diameter
H = height
Same numbers as applied for the xls figure you posted above with adjutsed x- and y- axis values.
Please note that the DXT waveguide has been optimized fot the applied dome tweeter (see impact of step 1 on the directivity here).
Using the Vifa XT25 ringradiator for the DXT-profile might change the directivity at high freququnecies. Might be seen by a respective simulation and adaptd accordingly. You'll be on the safe side if you use the dome tweeter used by seas (information available somewhere, just don't have it at hands actually).
Good luck and please post the results in case you proceed with the project....
I just tried to upload the RST28 STL file to JLCPCB and it thinks the WG is super tiny, any idea what I am doing wrong?
When I open up one of the STL files in Ultimaker Cura I scale it up 2540% (25.4mm = 1 inch). However, I have not actually printed one, so I don't know if that is exactly what you need to do or not.