Legis,
I think you are correct, it looks like the 2441 also goes from 1.5" to 2", but the throat looks like it is around 79mm, another 20mm longer than the 2446.
Art
Didn't notice this before. Why do you/would you want to use a non-comp HF driver? What comps have you used before?
Some progress. The throats are starting to look somewhat like how I want to leave them. After sanding, that is. 🙂 Couple treatments more perhaps.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Hi Legis,
I don't know if any of this will help, so just take it as techno musing (not music). 🙂
I started looking at using 11 degrees in AutoCAD. Then I looked @ the respective square areas in 1" steps from the driver mouth. Your areas would be rectangular, but the same method should tell you where the horn cross-section matches the driver throat angle extension cross-section. For example I found, that w/ a 1"Dia. mouth/14 degree throat angle driver you get from the 1"Dia. circle to a 1" square mouth in about 1/2" distance; so the mounting plate can also become the shape transition.
Regards,
I don't know if any of this will help, so just take it as techno musing (not music). 🙂
I started looking at using 11 degrees in AutoCAD. Then I looked @ the respective square areas in 1" steps from the driver mouth. Your areas would be rectangular, but the same method should tell you where the horn cross-section matches the driver throat angle extension cross-section. For example I found, that w/ a 1"Dia. mouth/14 degree throat angle driver you get from the 1"Dia. circle to a 1" square mouth in about 1/2" distance; so the mounting plate can also become the shape transition.
Regards,
Attachments
Hi Legis,
I'm still thinking about the driver to horn adaptor problem. I'll attach a sketch of what might be about correct.
Regards,
I'm still thinking about the driver to horn adaptor problem. I'll attach a sketch of what might be about correct.
Regards,
That looks really good transition to me, thanks! My horn adaptor is 30mm thick total (2x15mm). I have used a router to round the adaptor's exit to the horn (maybe the last 5mm or so). I have thought to make the whole adaptor with a small opening angle, close to 11deg (what the 2446 has) vertically and maybe slightly higher angle horizontally.
Managed to do a small flare to the adapter also, it was very good addition. This is how the throat is looking before I start finalize them by adding very small layers of wood filler and sanding it down to smooth surface. I'm very happy how they look and feel (very damped because of the thick layer of wood filler) and have no doubt the throat will sound very good.😉 The geometry does not show good until I have painted them I quess.
An externally hosted image should be here but it was not working when we last tested it.
Some progress. Heavy brass spikes (Eden Sound Bearpaw Sr.) and rosewood "pucks". Something less ugly to damp the mouth of tapped horns/pipes would be good.🙄
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
"the 244x all share "
The Alnico magnet drivers have a different throat angle than the ceramic drivers, the dome geometry is the same though.
I would be inclined to pick a newer driver with a smaller throat.
The Alnico magnet drivers have a different throat angle than the ceramic drivers, the dome geometry is the same though.
I would be inclined to pick a newer driver with a smaller throat.
"4" phragm comps are natural option. "
So use a JBL with a 4" dome and a 1.5" exit.
2447, 2451 2452, 2453, etc.
So use a JBL with a 4" dome and a 1.5" exit.
2447, 2451 2452, 2453, etc.
I propably will get some other 4" comps at some point. However this is not the first priority as I believe the 2446 will be very good with Truextents based on some experiences I have read. Some say 2445/2446 is their favourite driver shell/chassis with those 'phragms, exceeding the SQ of TAD TD4001.
Things are progressing. The throats are 99% complete, just minor smoothing if left to be done. The inside edges of the 15" injection ports have been slightly rounded (more on the apex side) and the 15" adapter edges have also been rouded with wood filler and sand paper to reduce all possible "two parallel wall action" to minimum inside the whole thing.
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Some more (all of it) painting done, I'm quite satisfied for the result. Both tapped horns are also painted and ready to rock. I think I can put them back together tomorrow, if I manage, the paint should be hardened enough. I have to think some temporal stands for the synergies.
I'm quite interested to see hear what all the smoothing and rounding has done to the sound. 🙂
(pardon for the mess)
Throat #1 and #2:
I'm quite interested to see hear what all the smoothing and rounding has done to the sound. 🙂
(pardon for the mess)
Throat #1 and #2:
Me too, my guess is it will change the response very little, but it will "see hear" better 😉.
Nice looking paint job!
Thanks! I can do for example the same (unorthodox style) hor/vert polar measurement from the horn's mouth like I did before. That might show some differences if there is any.
Awesome paint job! The vertex smoothing looks very nice. Could be a race car if it were a car. 🙂
Yes, and check both boxes, my other guess is driver differences will be more than the throat transition change.
Will do. Phragms are original JBL's, but metal surrounds can grow old in different pace. I will measure them both before I put them to the horns, for double check.
Thanks, the paint was quite good stuff to work with. The medium thick layer also damps the wood, which is good in this application.
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