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Posts: 386
Location: Oregon
Joined: January 12, 2008
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"Accuracy is either "accurate" or it is not accurate. 2+2=4 and 4 is the ONLY correct answer. It is either 4 or it is an innacurate answer."
Unfortunately, outside the realm of simple arithmetic, there are few "only" correct answers in the universe. In the real world (of, say, capacitor or resistor tolerances), you might have to settle for 3.997 as being RELATIVELY closer to perfect than 3.826. With slightly more advanced mathematics, many uncertainties come into play. Consider the case of Pi, which has been calculated out to thousands of decimal places, but still seems to keep going forever. How far do you need to calculate it for acceptable results? Maybe that depends, if you're an architect, on how big a round thing you're trying to build.
"And then you're left with perception and subjective opinions on what is "closer" to the real thing. Ask engineers what is more accurate and you get everything from horn speakers to panels to line arrays to single drivers. Engineers with degrees in the field can't even agree on a speaker design that is "accurate" or "closer to the ideal"."
Very true. Since absolute perfection is unattainable, these engineers focus on those aspects of performance which they personally (and dare I say "subjectively"?) find most important. Those who love efficiency and lifelike macrodynamics gravitate toward horns. Those into microdynamics and resolution of the finest midrange details like planars. Those who value wide, even dispersion and a huge soundstage like line arrays or omnidirectionals. And so on. But I suspect that MOST of them agree on the importance of reasonably flat frequency response, smooth (if declining) off-axis response, good phase tracking, low distortion, and lack of audible cabinet resonances. As a DIY speaker guy, nowhere near their level of expertise, I focus on these things because they are variables I can control. When I can measure precisely the response I modeled (and it sounds good to boot!), I know I've done something right.
"For instance by far the most realistic sound to my ear when it comes to transient attack of instruments and decay (body) of acoustic instruments of piano comes from SET amplifier than something like a Bryston. Yet every scientific aspect and measured response that I've seen makes that a curious proposition that is highly frustrating for me."
A lot of people have observed this, and I wonder if it has to do with complementary and cancelling distortions. The piano is notoriously the most difficult instrument to record. Microphones don't "hear" exactly like human ears, so maybe some of the piano's extremely complex overtone structure simply fails to get recorded, at the mic or somewhere down the signal chain? Maybe the SET's overtone structure "restores" something approximately similar to what got lost in the recording process, while the Bryston just tells you what is on the recording, and doesn't add its own commentary? Dunno--just speculating.
"And over the years of endless arguments why can't both coexist? It's like the vinyl CD debate - to me it's irrelevent - if this is about music there is SOOOO much music on vinyl not on CD that you should have a turntable. Conversely there is SOOOO much music on CD not on vinyl that vinyl philes should buy a CD player. If someone likes one over the other - so what? Why does everyone get upset?"
Sir -- let me shake your hand and buy you a beer! I love my vinyl (which includes hundreds of obscure titles that will NEVER see the light of laser) and I love my CDs. I've heard a number of different speaker types, including horns and planars, and have built conventional dynamic monopoles and omnidirectionals: I'm aware of the virtues and drawbacks of each type. I'm quite happy with my SS amp, but would certainly be open to listening to a good SET. I may yet build one from a kit or plans, just to see what all the fuss is about. (The only tube amp I have much experience with is the Dynaco ST-70, which I built from a kit when I was 16, and had frustrating reliability issues over the years).
I think people should listen to whatever they enjoy and can afford, even if it's only a table radio, regardless of whether I would enjoy it as much. I only get "upset" when I see GROSSLY misperforming or shoddily built products marketed as "high end," for ridiculous prices, and know I could build something far better at a fraction of the cost.
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