Open source Waveguides for CNC & 3D printing!

[Hiperia]

Anyone know if they are horn/waveguide for the TW29RN from SB acoustics ?



Thanks

 

[augerpro]

I did one early on but the results weren't very good. I'll revisit it at some point now that I've got better ways to work with big domes.

 

[mga2009]

Brandon,

Can the SB26STCN work with the waveguides designed for:

SB26ADC (Alu)
SB26CDC (Alu-Ceramic)
SB26STAC (Textile)

Thanks

 

[augerpro]

No, the faceplate cannot be removed

 

[b_force]

Are those not constructed on a similar way as the SB19ST ?
I forgot.

Because the faceplate of the SB19ST can be removed.
So after screwing, the rest is kind of glued in, but definitely removable.
(it's not glued in very heavy)

But also a bit more DIY than just a quick swap.

 

[augerpro]

I have some hear and the faceplate is glued to the rest of the tweeter in the STCN.

 

[Hiperia]

I did one early on but the results weren't very good. I'll revisit it at some point now that I've got better ways to work with big domes.

Ok realy realy nice !
I am very interested.


let me know if you need help or a TW29RN unit to do the job !


Thanks

 

[Trdat]

Simple questions guys, if we get the waveguide CNC'ed does it sit perfectly on the particular tweeter? And is there screw holes to connect them? No adapter needed?

Basically, once CNC'ed is it ready to go?

 

[fluid]

Brandon uses a bar over the tweeter where long screws go into the screw holes in the waveguide to put pressure on it.

You could use the same method, tap a thread or use an insert nut for and use bolts.

If you use those methods there is no need for an extra adapter if you are happy to hold the tweeter in by pressure.

 

[augerpro]

The two holes on the bottom are sized exactly so they can be tapped for M4 threads. So these are ready for CNC bit you still need to tap the holes and make the clamp/bar which can just be wood or plastic.

 

[Trdat]

Great, I just checked the 3D file and there is a place on the back that has the screw holes, I just need a clamp like the one shown above to hold them in place have I understood correctly?

Last question say for the Dayton tweeter which has a face plate, does that come off?

 

[joe carrow]

The dayton tweeter faceplate does come off.

 

[Pallas]

Does anyone recollect offhand which of these WG has the widest dispersion, let’s say at 10kHz? Thinking about a wide-but-controlled dispersion 3-way with WG tweeter over a ScanSpeak 10F.

 

[Face]

Does anyone recollect offhand which of these WG has the widest dispersion, let’s say at 10kHz? Thinking about a wide-but-controlled dispersion 3-way with WG tweeter over a ScanSpeak 10F.

SEOS-24 4” – Horns by Auto-Tech

 

[augerpro]

Any of the 4" designs. I have them for SB26, SB21. Thought I had one for the ScanSpeak Revelator D2104/7120 but looks like I never did.

That said, if you compare these against the factory tweeter, these waveguides often have wider dispersion on the top octave, especially for the fabric domes.

 

[Pallas]

That said, if you compare these against the factory tweeter, these waveguides often have wider dispersion on the top octave, especially for the fabric domes.

Interesting point. I’ve certainly noticed that with the XT-style ring radiators, which go from super beamy to very good in the right WG. Never paid much attention on standard domes though.

 

[bcodemz]

I have a question on how waveguides are designed.

Let's say I want a bigger 12" version of Augerpro's T25B waveguides. Since Augerpro has an optimized version of a 6" T25B waveguide. Does that mean scaling up to 12" would be a trivial task because it would keep all the throat geometries the same, but just scale the side walls another 6"?

Or does the optimization start from scratch for a larger waveguide and none of the work on the smaller dimension waveguides translate for a larger dimension waveguide of the same tweeter?

Thanks

 

[mga2009]

@augerpro

As the Peerless/Vifa OT19NC00-04 is in backorder until second semester of 2022, is there any chance we look for a replacement under USD$20 to use these great waveguides?

Let me know if you have any model in mind, maybe I can buy them and drop ship them to you, and you can ship them back once you finish.

Cheers.

 

[Trdat]

I'm powering on through page by page of this thread and I notice many Scanspeak tweeters compatible or at least have had an attempted pairing with the waveguides.

Do any of them mate with the D2608/913000 tweeter?

 

[augerpro]

mga2009> not really many options. The big issue is most of the tweeters that size have a faceplate glued to the body. SB21's aren't much more money though.

trdat> I have not made one for the 9130. Maybe at some point I will - I have some - but don't expect anything soon.