That’s almost a 10dB valley going there. What were the baffle dimensions and roundovers used? I am thinking 8" x 42" baffle with 1.5" radius roundovers for my project.
No roundovers on the test baffle. It is a pyramid shaped upper module
Randy 3w.pdf (14.6 KB)
The distance from the center of the driver to the top of the baffle is approx 9" which is 1/2 wavelength at 753Hz. The distance from the center of the driver to each side edge is approx 6.5" which is 1/2 wavelength at 1043Hz. Looking at the valley, this seems to line up with where the huge dip begins to take shape. Or are my calculations completely wrong?
Can you create the baffle in VituixCAD Diffraction tool and simulate it?
To simulate the diffraction in VCAD, we would need to know if the pyramid shaped upper module was sitting on top of the lower module when the FR measurement was taken. If it was, then we would need to know the width and height of the lower cabinet so that it could be included in the model.
Here is my combo that I will start working on in the Spring. I have already built test boxes for the woofers and mids just to see how well they modeled for lowend.
F3 will be about 38 hz. They can get down to 33 hz but they have lower excursion with the smaller box and higher tuning. Box volume will be 1.7 cubic foot for woofers and .3 for mids.
These should be able to play 123 db without going over XMAX.
AC200Mk2, AC120/50CK and Bliesma T34A. Also, four DSA-215 PR’s.
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Dang! That’ll be a good bit of awesome speaker
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That’s rad! 123 dB is no joke.
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I was breaking in an AC120 and the glue let go that held the spider to the frame.
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Love the dynamic capability!
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Yikes!
I have been beating on mine for a while with a 100 hz HP. Will only be using these for midrange. Probably 400 hz and up. Modeling even at full power shows maybe .5 mm excursion at 400 hz.
Ofcourse that is for the pair at 3 ft. But at 12 ft you are still looking at about 111 db.
Also, using four RSS315HO-44 subs for home theater. I have two 2400 watt amps to power them.
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Not a combo but was having fun with nano banana. This is what it spit out….!!!
Any preference ofr any of these designs?
Tapered, with 8/9/10” woofer and a 4/5” mid and a waveguided 1” tweeter in a pod.
This one is a coax mid/tweet with a 5/6” woofer. The port is supposed to be in the bottom or back, but it messed up, though the side ports look mean! when i asked it to move it to the back or bottom it gave me a boxy one… Meant to be 3D printed in sections and glued and painted. More difficult to achieve for me as i am just starting out in 3D printing.
I don’t know what’s it doing in the last image, looks like ET from behind!
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My vote would be for the standard looking one with the silver grille on the woofer. The others look interesting, but they have too many odd ball type reflective surfaces and cavities.
I like the first one, but I gravitate towards the tapered look. The red pod is an interesting touch. Would you even need a waveguide in a 3-way with a 4” mid?
Revel Gem2 and Salon2 have waveguides and 4” woofers…
