Was pondering the other day has any speaker company ever made a coaxial driver thats a 3 way?(Triaxial)
I dont mean like a car audio where they have a tweeter and super tweeter stuck on a stalk or like a BMS 15CN860 where its a 2way compression driver inside a woofer, more a tweeter inside a midrange inside a woofer? Like 2 cones bass/mid and maybe a dome tweeter all in the one frame so to speak.
Is there such a thing?
I dont mean like a car audio where they have a tweeter and super tweeter stuck on a stalk or like a BMS 15CN860 where its a 2way compression driver inside a woofer, more a tweeter inside a midrange inside a woofer? Like 2 cones bass/mid and maybe a dome tweeter all in the one frame so to speak.
Is there such a thing?
a few pro-sound units are available. here's one:
https://www.bmsspeakers.com/index.php-136.html?id=bms_12cn860
https://www.bmsspeakers.com/index.php-136.html?id=bms_12cn860
https://www.funktion-one.com/products/psm318-dj-monitor/ there is this but ASIK the compresion driver is coaxial a bit like the BMS.
That looks like the Trinity 6. I wanted to try some, but they haven't been available for quite a while. They're also more like a woofer+tweeter+supertweeter than woofer+mid+tweeter.
Although it may be considered "cheating," I would point out that Danley's Synergy and Unity (and derivatives) for all practical purposes, measure and test as a single driver. Several models, such as the iconic SH50, are de-facto "triaxial" in the sense they have a separate "tweeter", mids and woofers. There may be other designs that meet these criteria, but I'm most familiar with Danley.
Member
Joined 2006
Looks like Cabasse Pearl series is about the closest but its a coaxial with a woofer behind it(from what I can see in the exploded pictures)
Yes, but you can't really get much better from long throat coaxes used in pro audio (Beyma is another with such designs). All of them need tons of DSP correction and active drive due to multiple impedance peaks.
The Emerald Physics speakers (and later Spatial Audio as well, same chap) used a similar format. Though a passive crossover was attempted, it didn't work out that well AFAIK.
Lastly, I'm not aware of any coax, hifi or prosound with a proper axial response. Most smooth out a bit off-axis, some of that response is diffraction to equal distances from the throat gap.
It took me some time to wrap my brain around it, but I began to realize that concentric drivers like Kef offers probably aren't ideal.
Basically the shape of the waveguide around the tweeter is so critical, that screwing up that shape by making it a woofer isn't ideal.
Based on that, I'd say that SH50 type designs aren't "cheating" they're actually superior.