It's always 'what's the application?' .....
Typical seated, home hi-fi sweet-spot, equilateral triangle, stereo setup....I doubt vertical pattern matters that much, other than getting the right tonality after room response piles on.
If you want more than seated, vertical obviously matters...
EQ cannot solve or really change the vertical pattern. (or horiz)
The best EQ or xover design can do pattern-wise, is change lobing patterns for particular listening heights. (assuming vertically stacked drivers).
EQ can only really change overall power response ime.... simply by shaping overall response.
Always the application (and preferences)...horses for courses
If you love specificity, FB is probably not the best venue ;^).
Since the Axi2050 annular diaphragm at full excursion has no movement at the inner and outer edges of the Sd, you could figure displacement at roughly 1/2 of Sd multiplied by the excursion. However, the designer specifically mentioned excursion was linear to 1mm at the voice coil location, which conflicts with what you say the rep says.
Anyone feel any type of way about elliptical tractrix horns? They claim they can ship to America...
Considering adding an e-tractrix to list of others I’ve accumulated
Is there a maximum excursion I should aim for? With a 350hz tractrix in HornResp I can create a flat response to about 400hz...then natural roll takes over...with a 2nd order LR at 400 it brings excursion to about .5mm at 117ish dB....is that fine?
Is there a maximum excursion I should aim for? With a 350hz tractrix in HornResp I can create a flat response to about 400hz...then natural roll takes over...with a 2nd order LR at 400 it brings excursion to about .5mm at 117ish dB....is that fine?
Mitch, as you undoubtedly know, this is true for many oldskool drivers, but not necessarily for modern designs.
The beam width in the top octave is primarily defined by the phase-plug and - if present - the the angle of the conical section.
Here's an example of a 3" diaphragm, 2" exit driver mounted on a short(ened) horn. The driver's exit angle is 34.7°.
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I don’t know if my question was translated-able lol...sorry I work looong hours.
Looking at Hf drivers, of the compression driver variety....taking advantage of the Axi’s strengths...trying to use a 350hz tuned horn down to 400hz....via eq...in HornResp I am able to create a flat response down to 400hz, then the natural roll off takes over...excursion climbs...adding a 2nd order high pass at ~400hz knocks out the excursion....the max excursion is ~0.5mm....at intended max volume ~117db....
My question is....should I be concerned with IMD?
I'd be more worried about my ears at 117 db
Of course, as you may know already, listening at lower volume with a high volume potential system equates into low distortion
So it sounds like my biggest concern is going to be mating this unique roll off with the 15 underneath. They work is shorter days in Saturday’s...probably because they don’t want to pay me 14 hours of overtime in one day...I’ll load my 2 frequency responses into VituixCAD and see if I can’t make a baby
I read through the first 20+ pages of posts (great discussion) and then skipped towards the end to see where things are at today.
@camplo Are you still working on building a 2way or are you improving on one you've already built?
It seems like even the best 2ways are enhanced with subwoofers, is the goal still only a 2way?
@camplo Are you still working on building a 2way or are you improving on one you've already built?
It seems like even the best 2ways are enhanced with subwoofers, is the goal still only a 2way?
It became obvious that at least 3 channels of spectrum are a requirement for the best.
A 2 way plus sub?....a 3 way with a low crossover to bottom woofer?..
I finalized the design about the same time I started back to my seasonal career. I’ve contracted a company for the wood and cutting (Baltic birch) and have developed a horn with members here, and collected several other horns
For mixing/mastering purposes, I have theorized that a high amount of direct energy is desirable. The only way I know of to increase direct energy without turning up the volume knob is to increase driver surface area, horns, and directivity .
So my conclusion of (2 td18H+) + td15m + compression driver and horn (axi2050) is the result of this idea. High dynamic potential for un-compressed playback and low distortion. My first build will be with a manufactured horn (350hz Baltic birch e-tractrix) and I intend to 3D print horns that friends here designed for me.