ClaudeJ1
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Posts posted by ClaudeJ1
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On 9/21/2022 at 12:36 PM, Shakeydeal said:
I don't use a "processor". But it doesn't matter. Whatever preamp you put in front of any two amps will "color" them equally. As long as the preamp stays the same, the difference you hear is in the amplifier.
That should have read: "The difference you THINK your hear" is the real "difference." Many people have been humbled by a controlled listening session with an AB/X box. But you go on convincing yourself that your Quasi-religious experiences about amplifiers are technically or economically valid! To quote Paul W. Klipsch Himself: "BULLSHIT."
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On 9/21/2022 at 9:48 AM, Zen Traveler said:
Why do you see it as comical? It was a sincere effort of comparing apples to apples when it comes to power.
I was, and still am, learning to follow the expression: "Never argue with a fool, people might not know the difference." I just don't argue too much, and I DO know the difference!
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On 9/21/2022 at 3:59 AM, Shakeydeal said:
OP, see above post for example of amp=amp thinking. I know, I know, it’s comical, but I say let ‘em have their fun…..
Yes and "fun" is what people call out other people when they themselves have never designed an amplifier.
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On 9/22/2022 at 10:24 PM, gigantic said:So this happened… I have a sheet of 3/4” Baltic birch in my shop and enough spares to make another set…
Great use of plywood. Perfectly cut.
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16 minutes ago, Edgar said:
In 1993 I developed a signal processing technique that is so computationally-intensive that I thought I would never see it run in real-time during my lifetime. By about 2010 it could run in real-time on a telephone. It's an amazing time to be an engineer.
Back in my days in Automotive Electronics, the micro code was written in Assembly Language because of ROM limitations. Assembly language is one level up from computer machine language. Programming in it is like trying to run a marathon on your kneecaps with no pads!!
Now that memory is cheap and plentiful, is seem C+ or C++, or whatever derivation exists is the darling of the coders. It's memory capacity that allows for even inefficient/sloppy code to still work because hardware is so cheap.
In 1996, I paid $500 for a full size PCMCIA drive, the size of a cigarette pack for my Kodak DCS-420 digital camera ($21,000 in today's money for only 1.5 BAD Megapixels). The drive had a whopping 100 Megabyte capacity, which was Amazing at the time as to how "small" it was. Now you can get 100,000 times that capacity in an SD card for 1/10th the price. So the price/memory ratio is 1 Million to one. That's what I call real progress!
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On 9/21/2022 at 12:58 PM, Edgar said:
I think that the world has finally figured out that horns don't have to sound like "horns" if they're designed properly. Modern computational power and finite element analysis have made that possible. 3D printing has made prototyping much easier.
We do have amazing tools to work with. I have a 1904 Zeiss catalog that talks about Planar an Tessar lenses. They are still being made today, with derivations, using newer glass formulas and a billion ray traces/second in simulation. I understood that it took over 2 YEARS to do the lens math by hand, so without modern tools, I think Roy would still only be working on Iteration #7 of the K-402, with 63 more to go before the "Eureka!" moment. All good things withstand the ultimate test: the test of TIME!
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32 minutes ago, deang said:
Man, that one could either way. I predict 49 cents or 51 cents.
I think the udder is dry from all of us milking that one. We need a different sacrificial cow to discuss.
How about the blending of passive networks' roll-off characteristic in conjunction with the acoustic roll-off of a horn coupled with different driver characteristics, including the impedance peak?
Good start for the Chief or no??
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11 hours ago, Chief bonehead said:
if you are honest about yourself…..you never stop learning.
Of course, new knowledge (whether read from the past, or created in the present), is never truly learned until it is applied and practiced!
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9 minutes ago, Chief bonehead said:
Claude. I’m going to have to start calling 50 cent. Your stories are about 50% accurate…..lol!
That's what I get for not reading earlier responses before posting. I'm happy with 50%, but only half the time! HAH
As to "Fitty Cent," I'd be happy with only half his money!
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40 minutes ago, deang said:
I called all of these people earlier today and they denied knowing either of you.
You're slowing down. You were a much quicker smarta$$ 8 years ago! HAH
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12 minutes ago, Edgar said:
Again, I don't want to name any names, but at least a few of them have tried to participate in various audio forums and been thrown-off of them, either for blatant commercial self-promotion or for rudeness to other members.
I think I know exactly who you speak of. Michigan dude for sure.
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34 minutes ago, babadono said:
I must have been in the same room with you at one time or another and did not know it
It's possible. Meaning we have been around this industry for a while, aye?
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1 hour ago, Edgar said:
Others, who shall remain nameless, can be real prima donnas who will berate you for asking the time of day. I guess it's the same everywhere.
I think I already named one of them. [E.G.] for example for example. Not a good impression 50 years ago with no improvement I could hear last time heard. Heavy on theory and math, light on personality and actually building stuff.
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1 hour ago, Edgar said:
I think that the world has finally figured out that horns don't have to sound like "horns" if they're designed properly. Modern computational power and finite element analysis have made that possible. 3D printing has made prototyping much easier.
Dr. Earl Geddes is about 1/2 hour from me. His work on High Order Modes in horns deserves some credit. He's all about "waveguides" which, all horns are anyway, semantics. I heard him speak in 1976, after taking Mr. Klipsch's advice in his newsletters, and I joined the Audio Engineering Society. Met quite a few interesting characters here in Michigan. Like the SMWTMS engineers (David L. Clark and others) that invented the AB/X box. I was one of the first people to sit and listen with it, but I digress.
Like PWK said: "a horn is a reasonably rigid air column. You just have to figure out what shape to make it."
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4 minutes ago, Edgar said:
I corresponded with Don as recently as last December, then he suddenly stopped responding. I don't know whether there is a health problem, or some other pressing matter.
I communicated with Dr. Floyd Tool about 3 years ago. He said Harman owns the patents on CBT's and let Don propagate the technology (probably needed the money). I read somewhere that Don officially retired, so I hope he's sipping fruity drinks on an island somewhere or playing golf, who knows.
When I mentioned the JBL M2, this is what Toole said: "As far as horns are concerned, except for large sound reinforcement systems, the new JBL Pro M2 is state of the art in my experience. It is an exceptional performer - horn designed by Charles Sprinkle, then a consumer group engineer. I can detect no "horn" artifacts - a first."
Having owned 3 pairs of Roy's K-402's in the last 10 years (still have a pair) I can detect Zero horn artifacts on that one either.
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46 minutes ago, Edgar said:
Yes, I'm familiar with that paper by Don Keele. (And with Don Keele himself. I worked with Don at Electro-Voice, and got along with him just great. That's part of the reason that I wonder if PWK and I would have gotten along -- I think that we would have either "clicked" or hated each other's guts.)
I had lunch with Don, back in 2014. We talked about his current designs mostly, but he did say that he could have designed some new horns for Klilpsch, but PWK wouldn't let him for some reason. IDK. As far as I know, it was John Pope's PHd thesis, with math and measurements done in the Hope Anechoic Chamber (exponential vs. Tractrix) using an EV DH-1a driver that convinced Paul that tractrix was better, which opened the door to Roy designing the first Tractrix horn for the Forte II and the Chorus II (which I owned for a while). There's a published article with smoke in the picture about it somewhere.
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On 9/19/2022 at 7:49 PM, Edgar said:
Personally, I'd be very interested in how you turned a tractrix horn into a constant-directivity horn.
With an overly simplistic analysis of appearance only, it looks like a conical horn with a Tractrix Curve finish. A hybrid. If you read "What's so sacred about exponential horns" by Don Keele (who apparently did not get along well with PWK when he worked there). The idea of hybrids happened during his time at Electro Voice under Ray Newman's leadership. I have met all 4 of these gentlemen at on time or another since 1976 (also Saul Marantz as a 5th). Great evolution of the ART and science!
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5 hours ago, gigantic said:
I’m buying records and obsessing about audio in ways that I hadn’t in years, decades, even.
Great story of a great comeback with an Audio Vengeance!!
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21 hours ago, gigantic said:
they no longer have a retail presence, but have shipped their store to a home design center.
If sales of Stereo speaker systems had not been displaced by Apple Ear buds and the like, you'd have a different story to tell. Welcome to the reality of low sales to the young, who are the main buyers of music, as they were.
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34 minutes ago, gigantic said:
oooh, for some reason they didn't show up when I searched. It's a little bit of a haul- oddly enough, 20 miles to someone living in a city is perceptively farther than 20 miles in the suburbs, or as they say here in Philly, "everywhere in Philadelphia is an hour away from Philadelphia." I'll see if I can plan a trip out there some Saturday for a listening session. Judging by their online inventory, they only seem to have Cornwalls in stock, but that may do. that may do.
When you get your "Baby Cornwalls" finally done. Bring them to A/B with real Cornwalls for a surprise.
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23 minutes ago, Knows_Very_Little said:
I've had multiple B&W's over the years at all price points and I agree with you - my Heritage speakers spank the crap out the of the lifeless B&W's.
Dynamics are the key to a "live sounding" presentation. Higher efficiency means lower distortion and better dynamics. Hoffman's Law is still in effect, and horns are the most dynamic of all.
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20 hours ago, gigantic said:
I currently have a Denon AVR that sounds great and does everything I need it to, but I've been seeinga lot of mention about having a dedicated two channel receiver. What's the benefit? also, is there an advantage to vintage 70's gear, which is all the rage these days, vs amps and receivers from the 80's and even now?
Don't worry, be happy. Ignore the internet noise/mostly BS about separate 2 channels. Just use your AVR as a 2 channel device. Modern electronics are better than the old stuff in every way. Besides, when you consider your "near future" Super Heresy's will only need about 1/2 Watt at sane listening levels (or any Heritage Klipsch for that matter), who needs lotsa watts anyhow. That's for the British branded "Space Heaters that make Sound" like B&W, which were totally STOMPED by my Super Heresys.
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3 hours ago, gigantic said:
I'm realizing that as these woofers break in and start to come into their own, that I should probably change my subwoofer crossover frequency. I previously had it set around 80Hz; @ClaudeJ1, based on your graphs, what would you recommend for a revised x-over setting with the Eminence Delta Pro 12a?
Somewhere between 40-60 Hz. Highpass. Let your ears, room, and bass tests be the judge. I gave you some wiggle room.
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15 hours ago, ClaudeJ1 said:
Ah YES. Since he started with an A network, Sure! Great info Deano!
Also, since you saved over $100 on the woofers, you should put that money towards the Super Tweeters as a very important finishing touch to "complete the mod," as it were..............
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Why should I have a separate 2 channel amp?
in 2-Channel Home Audio
Posted
On this I agree, but it's because of better DEVICES (IC's and Transistors) along with better circuit designs that create that difference. Sticking my original point about using 2 channels of a modern AVR works just fine with Klipsch Heritage. Room and positioning will make more sonic difference than believing older technology is better. YES, all of this is MEASUREABLE too, and not merely another unsubstantiated internet opinion in an echo chamber created by other people high on opinions with the typical 99.9% Opinion vs. 0.1 percent verifyable FACTS.