Open source Waveguides for CNC & 3D printing!

The T34B with the elliptical waveguide really looks excellent ! The sensitivity is high at 104 dB and the usual 10Khz+ on axis dip is small and quite high in frequency (probably inaudible), despite the large size of the dome.
 
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Pretty crazy that the different dome profile is making this much of a difference. Great findings.
Not really.
Look at the mfg datasheets, tests by hificompass, audioxpress, troels gravesen etc.
Both for the T34-A/B and the T25 versions.
Look at the off axsis responses, mfg datasheets at 60 degrees @ 20 k hz or anywhere along off axis responses.
And look at the dome shapes in profile pics at the datasheets or hificompass, easily visible in T34A vs B.
On average the AL/mg dome shape causes the A versions to have a much wider dispersion.
The 34 mm A have dispersion comparable or better then many 1 inch tweeters and is only down 9db at 20k @60 deg.
The 34 B has a fairly flat diaphgram and resulting in less wide dispersion and is down 15 db at 20k @60 deg
That is 6 DB! of difference, from the mfg datasheets, and other easily available tests show the same trends.

And judging by this they will naturally require 2 different waveguide shapes for good off axis performance, because that is not a subtle difference.
 
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Okay, thanks!
Do you think you could create similar (shallow) waveguides for compression drivers as you did for the domes?
I ask because the domes on your website are all low-sensitivity/efficiency pieces. A compression driver has a much higher sensitivity and a much wider beam angle than an average dome, so in principle a more even acoustical dispersion could be achieved and there would be less constraint on matching with other drivers due to its high sensitivity.
Commercial waveguides/horns for compression drivers are usually have very high directivity and that's not always desirable, especially for domestical usage.
 
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