2020, Chapter 3:
Lighted by the Blind
snippers…
Moffat’s Corollary
Human hearing seems to be more integrative than differential, so those small differences between components may be magnified over time, and therefore seem larger and more important than during rapid switching.
This is based on Mike’s 40+ years of experience in audio, and it coincides with my own experience, as well as countless anecdotal reports. Again, not AES-level stuff, but also again, it’s a guess, a hypothesis…
And heck, if it’s true, it pretty much completely blows up the “burn-in” thing. If this is true, there is likely no burn-in except brain burn-in; your brain simply adapted over much listening time to the small differences in your current components, so when you swap one out, the difference seems much bigger at first.
snipperitous
I can attest to the brain burn in aspect, or at least that is what it seems like.
I can have my tube amp turned on and playing my 800's for hours, so everything is well warmed up and stabilized.
Then I'll don my 800's and my subsequent experiences of the SQ I hear, follows a consistent and repeatable pattern.
Namely, it takes 15-20 minutes for me to hear the acoustic presentation 'open up', and then after ≈30-45 minutes another step up in SQ, and again in the 1.25 to 1.75hrs time frame yet again, the SQ steps up.
I attribute this progression to my auditory 'processing' kicking into Hi-Rez mode in 3 stages, but really that is just a WAG (Wild Assed Guess) because it's the only thing that makes any sense.
I have observed this pattern for years, and on a variety of different gear.
But that isn't to say that other patterns of SQ shifts also don't happen, and with repeatable patterns as well, all based upon system mods and tweaks and circuit refinements.
Most of these are much longer in time frames, like tens of hrs, and days and weeks required before peak SQ with stability settles in.
These longer term patterns have also been observed, repeatedly over years and with a variety of gear.
And yes there are variations in the specific time frames for SQ shifts and changes.
And some of these shifts and changes are not '
better' SQ but are decidedly worse, with some extremes described as a Toilet Dump (
TD) experience, where the SQ sounds flat, 2-D, with no bass, and a SQ that decided sounds like your 60's car am radio playing.
Thankfully this
TD experience doesn't last very long (≈ 15-30hrs max) but the first time it happened I was convinced something had died or was broken…
That's when the sage wisdom of 'DO NOT change the setup of the system when it sounds terrible' kicked in, and I waited, thankfully, because when the SQ stepped up again, it exceeded the previous peak levels of SQ and remarkably so.
JJ