Let me rephrase my original comment - ignoring the plot: "As is well known, Arai horns usually exhibit a relatively flat on-axis response".
Here is an example of the 18Sound ND2060A + Arai 290, without active correction or filter:
Nothing new, nor a matter of life and death, so sit back and relax 🙂
Here is an example of the 18Sound ND2060A + Arai 290, without active correction or filter:
Nothing new, nor a matter of life and death, so sit back and relax 🙂
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That driver (and the 1460A) is spectacular except for that last half-octave. It’s the driver I recommended to PaulW over a decade ago.
un-smoothed:
https://www.htguide.com/forum/forum...34994-the-raptor-a-10-mtm?p=631116#post631116
un-smoothed:
https://www.htguide.com/forum/forum...34994-the-raptor-a-10-mtm?p=631116#post631116
If the whole message was that it beams so that the on-axis response stays flat, then it's really nothing new, I guess.
How is the ND850 compare with HF1460?
I remembered you said you'll return it because of its hard sound?
Would EQ save that?
i have not compared both in the same time , but just didn't keep the HH1460 because i didn't much see a big difference with the HF108 justify the adding cost .
the RCF850ND does'n't have the cleaner highs of these two Faitals drivers but can really go to 500hz so they are not made for the same application .
the RCF850ND does'n't have the cleaner highs of these two Faitals drivers but can really go to 500hz so they are not made for the same application .
The Raptures are illustrative of a sophisticated DIY effort that probably surpasses many comparable commercial designs.
I'd have opted for more efficient woofers with paper cones, but that's a matter of taste/preference.
The 1460A is high on my list, precisely because of the (classic) Al diaphragm.
Imo, the quality up to 10 kHz is much more important than what happens after 15 kHz.
But that's one big difference of high quality drivers - how they behave >10kHz.
I set as design rule for my cinema speakers to find a 1" driver with no resonances up to 20kHz. I always prefered tweeter membranes with their resonances far from the audible range (really dislike the older metal domes, really like the new Beryllium domes) and wanted a relaxed sound and in no way a "compression driver" sound. So I gave it a try.
That's where it starts to get tricky ... most drivers simply don't do that. I landed at the DE360 which behaves very well and sounds relaxed - but that's not a driver for crossing over at 1kHz on huge Horns.
When you only "need" up to 10kHz ... many options are available now. But when we talk about "BEST compression drivers 2023" we should aim higher?
I set as design rule for my cinema speakers to find a 1" driver with no resonances up to 20kHz. I always prefered tweeter membranes with their resonances far from the audible range (really dislike the older metal domes, really like the new Beryllium domes) and wanted a relaxed sound and in no way a "compression driver" sound. So I gave it a try.
That's where it starts to get tricky ... most drivers simply don't do that. I landed at the DE360 which behaves very well and sounds relaxed - but that's not a driver for crossing over at 1kHz on huge Horns.
When you only "need" up to 10kHz ... many options are available now. But when we talk about "BEST compression drivers 2023" we should aim higher?
The ME20 is really not a good horn to check the performance of any driver.
Hello All,
Added just for fun!
Thanks DT
Driver := fatialpro HF108R
Horn/Waveguide := fatialpro STH100
No smoothing
Added just for fun!
Thanks DT
Driver := fatialpro HF108R
Horn/Waveguide := fatialpro STH100
No smoothing
Hello All,
Think of a Tractrix as a controlled directivity waveguide not too different than a oblate spheroid waveguide.
Crossover above the peak on the impedance plot and put a blindfold over the eyes of the critics, they will never know.
Thanks DT
As an observer, recalling countless discussions in this forum since the mid-2000s, that comment made me chuckle 🙂
Yes, but Celestion is unusual as the majority do not provide PWT measurements. I find that very odd considering PWT is suppose to be a standard method of testing a compression driver.
Confusing choice of words as octaves are discrete like that. 108.24hz to 216.48hz is an octave. That degree of distortion in the upper treble region which is much less audible than the rest of the frequency range and thus is not as substantial as the graph implies, is characteristic of all metal diaphragm compression drivers with the exception of a couple beryllium dome drivers. Synthetic diaphragm drivers often have this issue to a lesser degree though they also lack the magic the metal diaphragm drivers which results in cymbals for example sounding very real and shimmery harmonic overtones. A lower mass adequately stiff diaphragm operating within its intended power handling range will be more extended thus pushing the moment of diaphragm breakup closer to the inaudibly high frequency point hence the use of beryllium.
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I think some of the older JBL drivers were also tested on PWT, but it would be really great if all manufacturers did so and included the exit angle in their specs. If also tested on a horn I think knowing what horn it was would be useful. My old Radian 950PB-16 were tested on an undisclosed Eminence horn (I suspect the H2?) - had I known what I now know I would not have purchased these drivers for the use I intended.