Hi, I found this driver https://images6.static-thomann.de/pics/atg/atgdata/document/specs/269244.pdf and would like to put it a tractrix horn. Is it possible to get/make a horn adapter that goes from 4" x 1" (25cm2) to round 2" throat. I don't want to make any compression so sd will not change. But the ? is, will I run into anormalities/distortion due to the throat change?
Regards Sebastian
Regards Sebastian
Greets!
For a properly smooth transition, the adapter needs to have a phase plug to keep the transition relatively short, especially with such a high aspect ratio, otherwise the entire horn except for possibly its 'bell' mouth ideally needs to be the 'adapter' since we want the transition radius to ideally = the horn's low corner frequency; so at minimum the horn must be truncated to keep the axial length the same and use either a foam insert or foam or similar around its mouth to damp any serious reflections/HOMs due to any abruptness in the transition in what is now a diffraction horn of sorts and use some form of EQ to offset any HF roll-off.
GM
For a properly smooth transition, the adapter needs to have a phase plug to keep the transition relatively short, especially with such a high aspect ratio, otherwise the entire horn except for possibly its 'bell' mouth ideally needs to be the 'adapter' since we want the transition radius to ideally = the horn's low corner frequency; so at minimum the horn must be truncated to keep the axial length the same and use either a foam insert or foam or similar around its mouth to damp any serious reflections/HOMs due to any abruptness in the transition in what is now a diffraction horn of sorts and use some form of EQ to offset any HF roll-off.
GM
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The 4512ND has only 10° high frequency vertical dispersion, it is already very directional in the HF.
Yes that is correct. But horizontal coverage is from 60° to 120° depending on the waveguide used. I like the directivity and focused sound of horns with minimal reflection from the room.
I like the directivity of horns too, but prefer to not use a diffraction throat like the 4512ND employs unless using multiple drivers.
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