Great Job. This is still open territory with the commercials, as new drivers are developed. You have your finger on the present. Did you ever find out why the dip at 4500 mhz? Carry on. Thank You.
I'd be suspect of the width element as being connected to the 4.8k wonkyness, ... via some quarter wave nulling. Plausible? Curious if this why so many hf waveguides utilize vertical divider components. Way WAY out of my depth here ... pure speculation. Thoughts?
Hi, how did you design the waveguide? Is there some online calculators or math needed or just yolo until you get something awesome? Appreciate any pointers you can give me as I want to design something similar for a different AMT tweeter (for fun) Cheers
The flare geometry is based on an equation that I’ve developed inside my CAD program. Sorry I couldn’t be of more help. I do offer design services though if you need a custom CAD file created. Joseph_crowe@josephcrowe.com
I have had good success with chamfers filling parallell areas around my ribbon. Nothing should be flat parallell. I suggest trying a small add on chamfers to the backplates. They dont have to cover the whole area, I think quarter wave physics come into play here. Also I've had little success with plates or grills. My Fountek plays way louder, deeper and clearer with my add on waveguide. But the stock one has almost parallell areas in the waveguide, so no wonder many thinks the stock waveguided one sounds worse. Its all about keeping standing wave and diffraction effects to a minimum.
Could the vertical dispertion be widened with acoustic lens ? By orienting the plates gradualy from say up at arond 60 dgr center flat and down also around 60 degr....great job you are doing, will try to adapt it to the beyma amt 150...its original horn is too deep...
It’s quite challenging to increase coverage in the vertical without compromising something else. Besides, what’s the total harm in narrow vertical directivity? There’s not a lot of supporting publications for it’s need, on the contrary plenty of research shows we are not very perceptive on vertical spaciousness. More research is needed on the specific topic but personally I wouldn’t sweat it. A flat frequency response is golden in my books. It basically means no trouble in other areas.
Great Job. This is still open territory with the commercials, as new drivers are developed. You have your finger on the present. Did you ever find out why the dip at 4500 mhz? Carry on. Thank You.
Well done!
I just bought this design. Can't wait to implement it.
Is it an idea to shine your light on the BG Nero 3 or the GRS PT2522-4?
I'd be suspect of the width element as being connected to the 4.8k wonkyness, ... via some quarter wave nulling.
Plausible?
Curious if this why so many hf waveguides utilize vertical divider components.
Way WAY out of my depth here ... pure speculation.
Thoughts?
Hi, how did you design the waveguide?
Is there some online calculators or math needed or just yolo until you get something awesome?
Appreciate any pointers you can give me as I want to design something similar for a different AMT tweeter (for fun)
Cheers
The flare geometry is based on an equation that I’ve developed inside my CAD program. Sorry I couldn’t be of more help. I do offer design services though if you need a custom CAD file created. Joseph_crowe@josephcrowe.com
Really great video and content. I printed a waveguide for a Mundorf tweeters. I have yet to try adding the fins.
The fins should help if done correctly.
Great video. Learn a lot🎉🎉🎉I will try open baffle with fins. Horn thing is hard to do.
also, how did you calculate the number and spacing of the wave guides?>
did you mock up an extended phase plug design that was EXTENDED outward as opposed to concave like yours across the front?
No, do you think that would be better?
how is this different than my TPL200 with factory Beyma horn?
The TPL is featured here…it’s quite different.
croweaudio.blogspot.com/2019/03/beyma-tpl-150h.html?m=1
I have had good success with chamfers filling parallell areas around my ribbon. Nothing should be flat parallell. I suggest trying a small add on chamfers to the backplates. They dont have to cover the whole area, I think quarter wave physics come into play here. Also I've had little success with plates or grills. My Fountek plays way louder, deeper and clearer with my add on waveguide. But the stock one has almost parallell areas in the waveguide, so no wonder many thinks the stock waveguided one sounds worse. Its all about keeping standing wave and diffraction effects to a minimum.
Could the vertical dispertion be widened with acoustic lens ? By orienting the plates gradualy from say up at arond 60 dgr center flat and down also around 60 degr....great job you are doing, will try to adapt it to the beyma amt 150...its original horn is too deep...
It’s quite challenging to increase coverage in the vertical without compromising something else. Besides, what’s the total harm in narrow vertical directivity? There’s not a lot of supporting publications for it’s need, on the contrary plenty of research shows we are not very perceptive on vertical spaciousness. More research is needed on the specific topic but personally I wouldn’t sweat it. A flat frequency response is golden in my books. It basically means no trouble in other areas.
With acoustic lenses we could so correct the only weekness off the big amt : narrow vertical dispertion
Would you happen to have a WAVE GUIDE for a Dayton Audio AMT Mini 8?
Sorry, no.
With a modest number of subs ... perhaps more of the focus is on his web presence.
phase plug extension...
It really disappoints me when a channel proprietor doesn’t interact with the audience he/she is ultimately trying to attract.