Its a 1.4" exit driver and I guess the diaphragm is 3" - 0010 ND1480BE - HF Drivers - Neodymium ND1480BE : Eighteen Sound - professional loudspeakers
I would sure like to hear this one. My hope is that it has better high freq extension than the Radian Be drivers.
Best
Kris
I would sure like to hear this one. My hope is that it has better high freq extension than the Radian Be drivers.
Best
Kris
The implication would be that you have experience with the 951BePb? I have a pair on SEOS24's. My guess would be that all the Be frams come from truextant (probably 4"?).
In any case, it should be par for the course that any 1.4 throat will exhibit the same mess over 10k that would be expected for any other 1.4" throat no?
Amazingly as a 34 Y/o male musician I can still hear out to 20k. Nerdy as it may be I bring earplugs to the movies (frozen isn't worth hearing loss). But from what I can still hear, no system is excellent directivity wise for the top octave. Not domes or compression drivers etc....
But me thinks that whenever a comp driver can bend the space time continuum, what is at stake is quite a bit larger than building speakers.
Which is only to say that "quid pro quo" the sacrifice is going to be the top end is a tad ragged for a 1.4 throat.
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The plot shown on this preliminary page is the one from the ND2080BE driver which has a 2" exit and 4" phragm, so it does not apply.
The ref is still out. If someone has access to early samples... impressions would be very welcome.
Kris
You need to go listen to some Danley Synergy horns. These will change your mind on what is possible.
Member
Joined 2003
I have. Although it was in the distributor's warehouse space. Certainly a truly excellent speaker, although I wouldn't necessarily put it ahead of what can be done with 951bepb (still working on that though...).
I'll admit I wasn't that focused on the top octave, but where the wavelengths are smaller than the throat size I don't see where they are any different from anything else.
Now we're talkin! How big are you going to make them?
Although count me in the group that believes the top octave can be man-handled into place just fine with digital eq for 1.4" throat sizes.
This version is planned to control pattern only down to about 500Hz (my current set is down to 385Hz, but only Horizontally; vertically it is something like 2kHz). The new one will have the same pattern drop frequency both horizontal and vertical, horizontal will be wide and vertical will be narrow. Assuming it all works as planned, of course (not always a safe bet with these kinds of things).
Width about 21", depth about 22", height about 30". Bass should do about 80Hz if sealed, maybe 50Hz if ported.
Width about 21", depth about 22", height about 30". Bass should do about 80Hz if sealed, maybe 50Hz if ported.
The NSD1480N makes it through the top octave pretty well.
0008 NSD1480N - HF Drivers - Neodymium NSD1480N : Eighteen Sound - professional loudspeakers
There are titanium drivers out there that sound good.
"With its very high value of elasticity modulus (six times higher than titanium and two times higher than beryllium), nitride coated film is capable of doubling the titanium stiffness. The piston frequency range motion extends frequency by 25%, showing a predictable, ideal frequency response decay and avoiding top-end spurious resonances"
0008 NSD1480N - HF Drivers - Neodymium NSD1480N : Eighteen Sound - professional loudspeakers
There are titanium drivers out there that sound good.
"With its very high value of elasticity modulus (six times higher than titanium and two times higher than beryllium), nitride coated film is capable of doubling the titanium stiffness. The piston frequency range motion extends frequency by 25%, showing a predictable, ideal frequency response decay and avoiding top-end spurious resonances"
You mean they're ND4015be ?can you give a link?
and what about 4" dia 18S drivers?..
This review by Voice coil mag /Vance Dickason is laughable.
Response measurements, impedance, etc looks atrocious.
Took a 1,5" exit driver at 2500$ a piece.
Measured it on a 2" horn/ waveguide. Assuming with a random? and badly matching throat adapter by how the measurements look.
And did not inform the readers about it, as most do not notice the horn it was tested on is a 2" exit ( 18S XR2064 ) that causes the anomalies in the 10khz+ range. So the review is not really useful or representative of the performance of the driver.
https://audioxpress.com/article/test-bench-eighteen-sound-nd4015be-beryllium-compression-driver
So when looking for data on the 4" ND4015BE's, look elsewhere then voice coil magazine
And no i did not request to reopen this thread, after 10 years.
