The K tube sounds as good as anything. Thanks for the tip. It will be a tough hobohorn fight when A/B comparing it to the Avantgarde trio/duo tweeter.
It is difficult to set the level of the K tube. It does not seem to blend in as well as a cone-shaped waveguide. Differences in directivity is a first thought considering its design. Yet my first immediate impression was that that it was a clear improvement over the previous waveguide. Will take some time to get used to.
It is difficult to set the level of the K tube. It does not seem to blend in as well as a cone-shaped waveguide. Differences in directivity is a first thought considering its design. Yet my first immediate impression was that that it was a clear improvement over the previous waveguide. Will take some time to get used to.
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That could be a good idea. I have no idea how big the back chamber should be. I am planning to build one with adjustible back cover. I will have to seal it for every trial depth to get a good impression. Sound like a lot of silicone and a lot of work. Bøøh...
I am also curious of multicells. I am pretty hooked on round horns and now suddenly k tubes. Maybe round multicells would suite my tastes better. I saw a roll of cardboard paper in the hardware store for $8. Hmmm.... ;-)
Sounds like a plan. You'll have issues with comb filtering with a round multicell.
Have you tried cold pressed paper? Its used for water colors. Its a little pricey but nice to work with.
Try this for a tractrix horn. A step up from duct tape and cardboard but cheap nonetheless.
http://www.diyaudio.com/forums/full-range/223313-foam-core-board-speaker-enclosures-187.html#post3541667
http://www.diyaudio.com/forums/full-range/223313-foam-core-board-speaker-enclosures-187.html#post3541667
Try this for a tractrix horn. A step up from duct tape and cardboard but cheap nonetheless.
http://www.diyaudio.com/forums/full-range/223313-foam-core-board-speaker-enclosures-187.html#post3541667
I have thought about it. The throat half of the horn can still be round and I can make the big mouth square. Would save a lot of work and would not affect sound much at all. But it is a hobby so it is meant to take time.
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Combfiltering? How do you know that? I have never seen a multicell composed of round sections.
That would be nice. I bought thick wallpaper instead. Should give similar results. I want make it very beautiful with long slices of paper placed in perfect distance to each other. The midbasshorn will get some kind of reinforcement. I think liquid plastic will do fine. It should soak into the fibers and make the fibers a natural kind of glassfiber. I am tired of picking glassfibers out of my eyeballs, so no more of that.
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You wont need that cotton in your horns in your picture. I used to do the same with the exact same drivers I use now for midrange. The Community M200. Now they suddenly sound soft as silk. It must be a mix between Avantgarde Acoustics design and the very soft newspapers. I tried with some sound isolation foam in there but there was no need.
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I was experimenting with the poly fill when that picture was taken about 1 1/2 years ago. It didn't seem to make enough improvement to be worthwhile. I was driving the 350 Hz Tractrix cardboard horn with a JBL 2440, and the K tube was driven by a B&C d250.
These speakers were thrown together for the InDIYana 2012 speaker show, theme was to build a "Rat Rocker", a speaker that looked terrible, but sounded good.
They don't exist anymore, so the point is moot.
New Hobohorn upper midrange horn candidate.
ABS/Cardboard is not a winning combo but it sounds nice. I liked newspaper better, which also was a more accurate replica of the Avantgarde trio horn and driver. It could be the wrong shape of the mouth, or the harder ABS material that I don't like as much now.
My limit is time and money and this took 30 minutes and cost $10. The expensive part was the JBL HL1425 that I had to adapt from 1" throat to 3.45cm throat for the Yamaha JA6681B. Fun Saturday morning project.
I noticed how the beginning of the JBL HL14-25 is shaped sort of like the Avantgarde Trio horn. I have that shape memorized in my head after modelling by hand before. The mouth need a lot more work, but I am hopeful.
ABS/Cardboard is not a winning combo but it sounds nice. I liked newspaper better, which also was a more accurate replica of the Avantgarde trio horn and driver. It could be the wrong shape of the mouth, or the harder ABS material that I don't like as much now.
My limit is time and money and this took 30 minutes and cost $10. The expensive part was the JBL HL1425 that I had to adapt from 1" throat to 3.45cm throat for the Yamaha JA6681B. Fun Saturday morning project.
I noticed how the beginning of the JBL HL14-25 is shaped sort of like the Avantgarde Trio horn. I have that shape memorized in my head after modelling by hand before. The mouth need a lot more work, but I am hopeful.
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