Open source Waveguides for CNC & 3D printing!

Remember you'll be crossing over from a mid driver with some beaming at the top of its range, into a tweeter dispersing much more widely at those frequencies. so the indirect sound making up a fair bit of what you hear will have a step transition from one driver to the other. Unless the radiation pattern of both drivers is similar at the crossover I'd recommend nothing steeper than 4th order filters.
 
My first attempt at a 3D printed waveguide needed a bracket. It was easy to draw and did the trick quite well.
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I did need a higher resolution model, but it was good enough for testing.
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Previously I had CNC milled a waveguide directly into the baffle. For this I just used a block with some foam to hold the tweeter in place. It's not perfect but has held up perfectly well.
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5": 5.78 x 4.88
6": 6.78 x 5.77

I just noticed the oddest thing. When I download an .stl from my website and open it in F360, it is scaled down in some way. Maybe 1/2 as big. They still print fine since many people have printed this already. Interestingly when I download and open the .step version, the dimensions are correct in F360. Anyone know why this might be happening? Why would F360 incorrectly read an .stl that was created in F360?

Maybe metric vs imperial conversion?
 
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