Well I don't get the habit between his real name and the company one, too close, confusing in my native language zat is not engliiish ! But like the guy
It's a combination of his last name (Geddes) and his wife's last name (Lee.)
Yep I know, it's not a critic from me. But do no why I can not get it right ater hundred of posts read from him. I think it's a sort of orthographic disphasy from me - not a dyslexia as I could read my mother language at 5 which is before most-. That's a shame because he makes great efforts to talk aboit his science with simple words for guys like me with no technical background. I apologize for that btw ! I mainly learned english on books and by taste for this language and its litterature but I' still very limited cause I learned it adult and I'm not very gifted in languages learning though I know few - but wrote bad- ! People that are easy and gifted to learn language don't know the luck they have
Well, I believed to understand some have side to side the 2" TD-4001 driver vs the 1.5" Faital 1440 ! Is someone aware of a side to side benchmark of both in a same horn with adaptaters or two different throated horns but from a same expansion design ? Legis member perhaps ?
People that are easy and gifted to learn language don't know the luck they have Well, I believed to understand some have side to side the 2" TD-4001 driver vs the 1.5" Faital 1440 ! Is someone aware of a side to side benchmark of both in a same horn with adaptaters or two different throated horns but from a same expansion design ? Legis member perhaps ?
Patent attached.
These horns are expensive to manufacture and have become obsolete due to their size and the advent of smaller PA systems, primarily line arrays.
Danley incorporated Keele's secondary mouth flare in his Synergy horns.
If you compare Keele's horns for EV & JBL, you'll find these are all variations on the same diffraction theme that he first introduced with HR series 1.
The slot in the JBL horns is positioned vertically in order to circumvent patent infringement.
While the Bi-Radial mouth section of the JBL can be considered an improvement, the HR series A is better, because the throat generates a much lower amount of diffraction and HOMs.
The HR series (including the smaller HR60 and 90) don't differ much from Arai, TAD and similar radial horns.
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It would be of high interest to see measurements with the Yuichi horn especially the impedance.
That already looks promising.
Tbh, I had my doubts about the output in the top octave, but they seem unfounded.
Once mounted to the Arai horn, the on-axis response should be pretty flat.
This driver definitely doesn't need a tweeter.
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Yep, shyly positive first bite. I also had slight doubts regarding the hf response.
They sound nice without horns, not the typical slightly muffled hf/details like with many bigger poly domes. Actually when listened like this, quite impossible to tell by listening what material the radiator is ie. I cannot hear any plastic spice in the sound (at least when not directly comparing to a be-diaphragm driver, I reserve a right to alter my opinion). The 1" coil bms 4524/2426HE is also not bad in this regard for a plastic driver (very good details in hf), but remarkable that the faital is much bigger with a radiating area +/- of a 3" dome.
Might be the high flux which deeply saturates the irons and the coil does not need any shorting ring to have low Le. There seems to be a neodymium ring inside the voice coil under the top plate. Might be a two neodymium ring driver to get that massive flux.
They sound nice without horns, not the typical slightly muffled hf/details like with many bigger poly domes. Actually when listened like this, quite impossible to tell by listening what material the radiator is ie. I cannot hear any plastic spice in the sound (at least when not directly comparing to a be-diaphragm driver, I reserve a right to alter my opinion
). The 1" coil bms 4524/2426HE is also not bad in this regard for a plastic driver (very good details in hf), but remarkable that the faital is much bigger with a radiating area +/- of a 3" dome.Might be the high flux which deeply saturates the irons and the coil does not need any shorting ring to have low Le. There seems to be a neodymium ring inside the voice coil under the top plate. Might be a two neodymium ring driver to get that massive flux.
I don't have any other Faital drivers.
Yep there's a small bump 12-15khz. Not alarming as it's wide Q at least without a horn. Higher Q horn profile (slowly opening) might even damp it more by increasing the air mass load (or not). I wouldn't worry about it. Also the impulse response is very clean, does not store energy/ring.
edit. here's the graph. The ultimate shape will change in a horn and won't be as underdamped, but what to look for is the quite small amount of high-freq "zig-zag" after the impulse.
Another example:
Yep there's a small bump 12-15khz. Not alarming as it's wide Q at least without a horn. Higher Q horn profile (slowly opening) might even damp it more by increasing the air mass load (or not
). I wouldn't worry about it. Also the impulse response is very clean, does not store energy/ring.edit. here's the graph. The ultimate shape will change in a horn and won't be as underdamped, but what to look for is the quite small amount of high-freq "zig-zag" after the impulse.
Another example:
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