"We all knew that back in 1930'Th!" 😀
Nobody can compete against the person with this slogan John. 🙂
It better not be or you, Nelson, and Chales Hansen are in trouble! 😉.
Please read the results, even the lowly AD712 does't register. AD797 UNDEGENERATED bi-polar, no reading, no PIM, no TIM, results even from your side. Don't get me wrong a 50 cent op-amp might be 5 orders of magnitudes DIFFERENT than a ZEN amp, I think the door is open now to find one of those euphonic colorations that causes preference. We might want add lots of PIM for the right sound after all most mechanical forms of recording are packed with it..
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Scott; working on a "grand piano" effect for bass guitar I discovered that PIM is useless, it causes NASTY sound. Let's forget about "euphonic" epithets for this phenomena.
If people still prefer "you, Nelson, and Chales Hansen" let's search for the answer in the different dimensions.
If people still prefer "you, Nelson, and Chales Hansen" let's search for the answer in the different dimensions.
Good insight. I brought this observation up to Jan at AES. All we need is a flutter generator with the right modulation spectrum to get class A sound. People seem to prefer an LP cut from a digital master to the original digital master that is not available. All you get is a collection of distortions plus noise in the lp but people love it. I have also heard that running a track through a tape recorder (in and out) to add some tape "sweetening" like flutter and noise with some saturation distortion "enhances" the sound.
We have been pursuing the wrong goal all along.
I said it last week, I don't think this will lead to many answers just having some fun. Trick or Treat!
Congratulations Demian!
Now you have a chance to start perusing an another goal. You heard already an example how Nelson speaking about added on purpose distortions even turning away from microphones sounded like Nelson speaking in the big room away from microphones, but louder. And no more distortions were needed so hear that it was Nelson Pass speaking turning away from microphones.
Let's speak of systems that work humbly, as if they don't exist at all?
Even Ron points out that video designers have worried about this for decades, no one ever said it doesn't exist. When flesh is green people complain, since the results for audio seem in one sense flipped it's anyone's guess how it matters.
Electrostatics and Isodynamics need a supporting structure. On the ESL, this can be made part of the acoustic system. More difficult for Isodynamics. The rare-earth magnets allowed this to be smaller so made them viable though it is still a problem. I'll discuss the ESL-63 as IMHO, it is the best Electrostatic.
I bought one of the first ESL-63s and discussed it at length with Peter Walker. It has probably the best Delayed Resonance Curve of any speaker I've seen ... up to about 1kHz.
AES E-Library Analogue Loudspeaker Measurement with -3-D- Display We called these PAFplots after Peter Fryer as opposed to the CDS KEFplots which are now a 'feature' of all fancy acoustic measurement packages. KEFplots have no resolution below about 1kHz
It's performance above that isn't bad but the contrast with lower frequencies is so marked that it sticks out in a Blind Listening Test.
It's caused by the dust covers without which the speaker lasts about 3 mths. The wonderful looking curves for the ESL-63 in their AES paper were done without dust covers. 😱
You can put dust absorbers next to the speakers, like Chizhevsky lamps that will attract all garbage particles and emit good for health ions. 😀
PS: my line arrays in walls, looking like picture frames, deserve high WAF number, and work almost 3 years without any maintenance. An array of light cones each driven by small powerful motor, almost like isodynamics. You can't repair a peace of an isodynamic speaker, but you can replace one of failed drivers in an array.
PS: my line arrays in walls, looking like picture frames, deserve high WAF number, and work almost 3 years without any maintenance. An array of light cones each driven by small powerful motor, almost like isodynamics. You can't repair a peace of an isodynamic speaker, but you can replace one of failed drivers in an array.
ESL-63 without dust covers are very efficient dust absorbers, in fact very similar to your Chizhevsky lamps.
If you don't mind sending your ESL-63 for factory re-furbishment every 3 mths, I recommend you try them w/o dustcovers. But please don't wait until they arc over before you do that or your bill will be somewhat greater. 😀
If you live in the UK, your 3 mth service is probably no more expensive than NOS Mullard EL34s or Gold Lion KT88s for your amp.
What did I say? That FM distortion is the ONLY important distortion left? Seems to me that xover distortion is what is most audible today. Today, I am working with a design that has a 350 ohm load, and the part is rated for 600 ohms (nominally). Can't measure much, anyone think I might have a problem, subjectively? Me, being me, I am concerned. Don't worry Scott, your op amp is not under consideration, here or in the JC-3.
Are you kidding? I said, next to the speaker! I can provide Chizhevsky lamps cheaper than service of your speakers. And I can add some knobs, to vary garbage attraction parameters.
On my personal power amp (4HEXFETS), and from an absolute subjective point of view (listening feelings), there is an optimal biasing around 150mA for each FET. If i increase bias (less theoretical crossover distortion), sound is not so good. Any explanation ?
Xover distortion can be tolerated if they are the way under the rug. But the level under the rug is the problem, so it is better to eliminate them principally to avoid all arguments at once.
Overall, audible non-linear system distortion is still the answer. It obviously exists, otherwise every system would sound the same as the next. If you want to get fussy, throw in a decent DSP to guarantee that the linear distortion is absolutely minimal, but .... still they differ!!
The final frontier ...
Frank
The final frontier ...
Frank
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