Edgar
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Posts posted by Edgar
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56 minutes ago, henry4841 said:
Roy blush, come on. Only normal folks do that.
I've met @Chief bonehead, and he's a regular guy, just like me.
On second thought, maybe that's not the best example ...
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4 minutes ago, Travis In Austin said:
Math?
For innovation, the math can either lead the design, or the design can lead the math. In the former, one can look at all of the equations and notice that setting constraints and variable values in certain ways leads to interesting outcomes, some of which may be useful. In the latter, one has the idea for the interesting outcome first, and then tries to manipulate the math to achieve that outcome. I suspect that Roy's "modified tractrix" followed the latter procedure, and I would find it interesting to see how that happened.
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25 minutes ago, Chief bonehead said:
I don’t know if I even still have those horns…….it certainly was a Kodak moment.
Personally, I'd be very interested in how you turned a tractrix horn into a constant-directivity horn.
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5 minutes ago, Travis In Austin said:
October, 2019, I know, it seems longer, but right before Covid (March of 2020).
Thanks for the correction. Still, three years is a longer time than I realized.
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4 minutes ago, Schu said:
they aren't equivalent or synonymous?
better check again.
Even if they were (which they aren't), misquoting is bad form. If I had meant "coloration", I'd have said "coloration".
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7 minutes ago, Emile said:
Haha; had to google it ... I see what you did there
Thanks. But all I see is that @Schu changed my words when he quoted me.
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6 minutes ago, Schu said:
ISWYDT
😆
I have no idea what that means. 😕
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The 2018 Bonehead class was about maintaining PWK's legacy. Perhaps the next could be a discussion and comparison of horn contours.
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Last Bonehead class was in October 2018, I think ... pre-pandemic. Hard to believe that four years have passed.
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15 minutes ago, henry4841 said:
This is what I was after when starting this thread. More specifics of Klipsch R&D and their products. Perhaps Roy will smile and join in the conversation at some point. I sure want to hear any and everything he has to say!
@Chief bonehead, maybe it's time for another Bonehead class.
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6 hours ago, JL Sargent said:
RR3?
No, sorry. Thank you for trying. (It's RR4, 270KΩ -- red|violet|black|orange|brown.)
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Didn't anybody warn you about the self-destruct button? 🙂
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1 hour ago, Chief bonehead said:
The forum caught the bonehead virus.
How is that transmitted? Obviously it's extremely contagious.
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4 minutes ago, jjptkd said:
I was speaking towards Klipschs' influencer I believe I read that somewhere long ago.
As I understand things (I probably read the same thing that you did), Edgar's Speaker Builder article in February, 1981 caught the eye of someone at Klipsch. @Chief bonehead would know for certain.
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34 minutes ago, jjptkd said:
can't remember who did off the top of my head, Dr Edgar?
Paul G.A.H Voigt. Bruce Edgar resurrected the idea in the early 1980s.
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1 minute ago, Dave1291 said:
Is this a trick question? 😂
Nope!
I tried to install all of the resistors so that the color code read in the same direction as the writing under the component. So for horizontal resistors the color code reads left-to-right. For vertical resistors the color code reads bottom-to-top.
Doesn't every obsessive circuit builder do the same? 🙂
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My latest build. Just finished about fifteen minutes ago.
I think I'm posting this just to prove that a theoretical, math-geek DSP electrical engineer can still wield a soldering iron.
Can you find the one resistor that is mounted backwards?
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17 minutes ago, tigerwoodKhorns said:
come on now, you expect me to read the ad???
My comment was aimed at Cerwin-Vega, not at you.
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A speaker that only goes down to 37 Hz (-10dB) is a woofer, not a subwoofer.
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2 hours ago, John Warren said:
The most popular loudspeakers are ear buds.
Yes, but are they horn-loaded ear buds? 🙂
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2 hours ago, Islander said:
If you send it really low-frequency music, if it can't play it, you won't hear it.
No, but it will still be moving considerable amounts, in response to those low-frequency signals that it cannot play loud enough for you to hear, adding modulation distortion to what you can hear.
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6 hours ago, Chief bonehead said:
Can someone figure out the values for two pole highpass filter with a -3dB at let’s say 40 Hz for let’s say a 4 ohm load?
That's another good argument against the idea -- inductors for low cutoff frequencies get very large, very fast. Furthermore, you're trying to design a passive filter for a load whose impedance is varying wildly near the system resonant frequency, so the filter that you design won't be the filter that you actually get. If such a filter is to be used, then it should be placed in the low-level signal chain, i.e., before the amplifier.
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6 minutes ago, captainbeefheart said:
If this was possibly a pro audio situation Edgar's device would be a much better approach than a band pass filter which was probably it's intended market?
Exactly. This was intended for sound reinforcement loudspeakers, as might be used in a theater or performance hall. They face much higher power levels than the typical living room speaker.
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6 minutes ago, captainbeefheart said:
So yes the speaker will reproduce those frequencies but with greatly reduced excursion moving less air and less sound pressure output.
That's only true for a closed-box woofer. In a vented box, once below the box tuning frequency the woofer and the port outputs are increasingly out-of-phase. So the woofer excursion increases even when the total radiated acoustical output is decreasing.
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Meet Roy Delgado
in General Klipsch Info
Posted
It's been quite a lot longer than that. Yesterday I was reviewing a forum conversation that I had with him back in 2008, when he was known as "Bodcaw Boy."