Random Lunatic
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- Jun 1, 2021
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Thanks for sharing.
Last night, I invited my son friend (not an audiophile) to listen.
We used the telerac 1812 overture SACD, playing the songs 2 times and ask him to focus on the dynamic and details.
He was able to detect difference between AHB2 and Purifi.
But when I used my old entry surround speakers as test, none of us could tell the difference. So high resolution speakers matter.
I believe we need to develop new measurement method that explains WHAT we HEAR
Current measurement of freq response , IMD, THD based on sinewave and dummy load is single dimension and do NOT fully explain what we hear.
The speakers certainly matter, I heard the Purifi on Dynaudio Confidence speakers first, where this trait was barely noticeable: those are quite inefficient, and use soft dome tweeters. But on a very efficient JBL speaker with titanium tweeter, this character became quite obvious (relatively speaking).
As for measurements, the current measurements correspond just fine to make known audible characteristics, Bruno himeself mentions this in some of his presentations - however in most of their cases, at this point we've "solved" those measurable traits to a point where they by generally accepted standards should not be an audible issue or trait anymore - it would be interesting to double test this, but that would both be troublesome, and I suspect they'd be proven correct.
However there are also some things/phenomena we don't yet have conclusive methodology for describing, even if very visible within current measurements. Though I don't think this current matter falls into that category.
I'm entirely confident that, assuming what we're hearing is real (which of course it might not be, as some have not very subtly eluded to), then the explanation is likely to be found in some known measurement. Exactly where though is less clear. Amplifiers are extremely complex, and based on what I've heard explained, just by studying Bruno's work alone, there are numerous factors which could theoretically explain different amplifier's inherent sound characters that some purport to be able to hear. But at the same time, as said, they're often in modern amps at a level where they should theoretically not be audible characteristics in most properly designed amps.
I suspect it would require someone of quite lofty engineering caliber to build an amp to the best of their ability, and then mess with every little aspect of it, whilst simultaneously measuring and doing controlled blind tests, to have any hope of identifying is properly - given the current lack of meaningful conclusions on the topic... Short of on one hand subjective anecdotes, and the other mostly mockery.