Sure is, I managed to get good measurements of the throat of the redcatt coaxial by knocking it of its glue joint so v2 as I showed in the image is printing right now. With a nicer fitting against the metal.
This test print of the surfaces that will touch fits really nice.
This test print of the surfaces that will touch fits really nice.
Attachments
A big tip for co-entrant style multiple-entry horns;
The holes will f*ck up the hf response badly because of all the internal reflections.
This can be solved for a very large part by covering the mid-holes with an acoustic mesh (like a gore acoustic vent https://www.gore.com/products/gore-acoustic-vents-industrial-applications) with just about the right acoustic resistance (use the lumped part of abec to test this) to be "open" for the mid frequencies while being "closed " for the HF.
The membrane should be reactive, not resistive (meaning not porous)
hint; even a bit of painters masking tape could work..
Kees
The holes will f*ck up the hf response badly because of all the internal reflections.
This can be solved for a very large part by covering the mid-holes with an acoustic mesh (like a gore acoustic vent https://www.gore.com/products/gore-acoustic-vents-industrial-applications) with just about the right acoustic resistance (use the lumped part of abec to test this) to be "open" for the mid frequencies while being "closed " for the HF.
The membrane should be reactive, not resistive (meaning not porous)
hint; even a bit of painters masking tape could work..
Kees
Absolutely true in what you say. I have tried using open cell foam from phase plug of the tweeter and up to the ports and I plan to try going beyond the ports as well.
But you gave me an idea. I will print a thin insert like the one in the photo but without any opening to see the effect with and without the midrange insertion ports in real life.
But you gave me an idea. I will print a thin insert like the one in the photo but without any opening to see the effect with and without the midrange insertion ports in real life.
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Thanks a lot for the link, I thought about the possibility with a Mesh sometimes, but never found the right product for deeper research
Daniel
Love it!
The h108 has a 31 deg exit; would such an adapter be a an advantage over the «standard» you have already developed for the h108?
It's much easier to work with a driver like
https://www.bcspeakers.com/en/products/coaxial/6-5/8/6hcx51
since it has a larger voice coil and much more space to play around with.
This is something I'm working on at the moment:
I've had some success with this Oberton driver as it has a very shallow wide angle "adapter"
The tricky part is that a lot of these smaller compression driver can't play very low and you kind of want them to go down to 1k
Maybe a better way of doing it will be using a coax with a tweeter and making a phase plug on that
Kind of what PHL offer...
They also have woofers with just holes, so you can attach your own CD on it.
Maybe you can even try to remove the aluminum piece in your driver, as it should have no effect on the magnetic field.
Well this piece is part of the motor structure with steel and also a magnet so it’s not something one should remove.
And @aragorus funny you should mention Oberton. https://www.oberton.com/en/products/neodymium-coaxials/467-10ncx.html?showall=1 this one have a nice compression driver with composite membrane.
Bucket list driver for me and these types of builds.
And @aragorus funny you should mention Oberton. https://www.oberton.com/en/products/neodymium-coaxials/467-10ncx.html?showall=1 this one have a nice compression driver with composite membrane.
Bucket list driver for me and these types of builds.
