Expensive cables, lines powerlines, and interconnects are just Audio Jewelry

0 Members and 2 Guests are viewing this topic. Read 33006 times.

TONEPUB

What I've always found curious is how so many people seem to need to firmly adopt one belief or the other even though from my perspective, there's still plenty of ambiguity. Perhaps it's just part of human nature, similar to how many people seemingly need to believe in God or some other deity in spite of any ambiguity.

Or like how many other people seemingly need to believe in atheism or believe the question is undecidable (which is the same thing in practical terms)?

I might have added "in spite of any ambiguity" but the phrase doesn't really make sense in the context you used it.

This not a quote from one of my posts.  I don't know how I keep getting dragged into these posts that are not mine...

TONEPUB


Not to worry, I was just kidding....

If I had an extra 25k laying around, I'd be down at the BMW dealership making a good deal
on a used 330i.  My 87 325 has 200k on the clock! (but still runs like a top!)

But are you sure you can actually percieve a difference vs a Honda?  :lol:

You should ask the dealer for a double blind test at the racetrack.

I've driven hundreds of high performance German cars.  Don't even need
a double blind for this...

It's funny.  Two good freinds of mine each wanted to buy a new car. One
wanted the new small Lexus and one wanted a 330i....  Neither of them had
ever owned or driven a Lexus or BMW, yet were convinced that was what they
wanted.

Rather than take the bias towards BMW (because that's what I like...) I advised
them to drive each car back to back, betting them both that they would walk
away wanting one much more than the other.

Sure enough!  The one that thought he wanted a Lexus ended up buying a BMW
and vice versa for the other one...

The moral of the story, you need to find what makes you happy about writing a check!

PaulFolbrecht

  • Full Member
  • Posts: 761
This not a quote from one of my posts.  I don't know how I keep getting dragged into these posts that are not mine...

TERRIBLY sorry, Jeff - the quote was Mr. Eddy's and I'm not quite sure how that mis-quote occurred.  My bad with the editor, probably!   :?

AJinFLA

  • Industry Participant
  • Posts: 1115
  • Soundfield Audio Loudspeakers
    • Soundfield Audio

So, I'm a bloody wanker and should shut up and listen to Steve Eddy? 

He never said you need to listen to Steve Eddy. Personally I like the contributions of Steve Eddy, and jneutron et al. These guys have forgotten more about electrical engineering than I'll ever learn in my lifetime, so I value that they even take the time to give us real world data that is beyond our general knowledge. Which BTW, is why these threads are so valuable to me. It helps satisfy my hunger for knowledge.

se also forces me to think, and re-think my position on what I perceive when I'm critically listening to gear, and/or music. Also something I enjoy (dammit!).

As a matter of fact, it forced me to re-check myself as I was critically listening to 2 different power supplies on my SB 3 this evening.

For some, audio and the scientific method do not have to be in conflict. For others, they are incompatible, a direct assault upon their faith by the mere mention. A source of great anger.

Quote
The verdict? I most certainly clearly hear differences in the 2 power supplies.
Should I find the time, I would even try and record a two channel recording of my speakers with the different power supplies and burn it on a CD for others to hear. I'd love to do it, just dunno if I can find the time.
Let's not get this thread canned guys. K?
Cheers
Bill Waslo has an interesting program (free too) that you may want to take a look at. Hopefully that's not considered a cardinal sin.

cheers,

AJ

Occam

So, I'm a bloody wanker and should shut up and listen to Steve Eddy? 
..... &*@(.

Yes... yes you are, and should.  :wink: Consider it Cosmic Retribution, for something you obviously did in a prior life. Its almost Albigensian as you've transformed (this small slice of) your life on earth into purgatory, forever more fuming over the epistemological and rhetorical musings of our master debater.

and Scott - that goes double for you. No wonder your brain hurts

TheChairGuy

So, I'm a bloody wanker and should shut up and listen to Steve Eddy?  What the?  Did you take my comments directed to AJ specifically as a general statement about the whole thread?  I think you missed my point, Freo.... I don't see how it's arrogant or ignorant to call out someone who hasn't done any experimentation and then discards everyone's opinion as invalid that actually has.  It's offensive to me to disrespect the work people here have put into this hobby.  I hope a mod can move this comment and yours to me to FC... Name calling isn't allowed here, &*@(. ;)

This topic is so long, that I lost the 'trail' about 10 pages ago.  Steve Eddy must type 90wpm as topics he's in move muy rapido  :icon_lol:

Hey, nothing I see about this topic is truly ugly yet...but if you have something to day, try to be mindful of the way you say/write it.  To the most American and Canadian audience at AC, 'a bloody wanker' isn't terribly derogatory as we/they don't read it as such...but the same term, said in earnest to say a Brit or Aussie might escalate a dispute into a higher gear.

Frankly, this topic has wandered far afield and for quite a long time now.....please add some levity/good humor and a touch of insight and we'll keep it running.  If both fail to materialize, I'll close it and we'll move on to some other audiophool frivolity here on AudioCircle  :roll:

Carl - Fight Club was closed recently.  There was some debate on it, but the prevailing decision was that it agitated, more than bled out, bad blood between parties.  I was kinda' ambilvalent on the subject, but the Fight Club is now closed, nonetheless.

Thanks all,

John / TheChairlessGuy / Facilitator Audio Central


Summer

  • Jr. Member
  • Posts: 11
.....Read the links.....
Ok, so I decided to read some of the links... Didn't find a lot of real information... a lot of thoughts, opinions, etc.. and a few actual tests. 




You don't find this an actual test?

Interconnects and Wires  PSACS ABX Test Results  reference: http://www.provide.net/~djcarlst/abx_wire.htm
Interconnects and Speaker Wires   Result   Correct   p less than   Listeners
$2.50 blister pack phono cable vs. PSACS Best   70 / 139 = 50%-7
$418 Type "T1" Biwire vs. 16 Gauge Zip Cord      4 / 10 = 40%-1
Type "Z" Biwired Speaker Cable vs. 16 Gauge Zip Cord 70 / 139 = 50%-7
$990 "T2" Speaker Cable vs. 16 Gauge Zip Cord   16 / 32 = 50%-2

In the first test, five specialty interconnects from AudioQuest, MIT, Monster Cable, H.E.A.R., plus Belden cable with Vampire connectors were compared to a $2.50 blister pack RCA phono interconnect. Listeners used Etymotic Research ER4 in-ear phones driven by the headphone jack of a Bryston 2B power amplifier.
The next three tests are the data from Tom Nousaine's "Wired Wisdom: The Great Chicago Cable Caper", listed on the ABX periodicals page.
The Type "T1" cables were compared on a system including an Sumo Andromeda power amp and JS Engineering Infinite Slope speakers, by the system's owner. He chose his own program material and had no time limit.
The Type "Z" cables were tested on the system of a high end audio shop employee including: Snell type B-Minor speakers; Forte Model 6 Power Amp; and an outboard DAC. He used his own program material selected to show the differneces he expected.
The Type "T2" cables were compared on a system including a Denon DCD-1290 CD player, and Accuphase P-300 power amplifier, and Snell KII speakers.


No better than 50% could tell the difference between $1000 dollar Speaker cable and 16 gauge Zip Coard?   You don’t believe this is scientific?


Send questions or comments on the ABX Web Page to David Carlstrom.





 I'm not surprised a manufacturer of gear (McIntosh) thinks poorly of cable snake oil.  Most designers I've spoken with couldn't care less about what wire you use to and from their gear as long as it's technically adequate.  I'd be willing to bet McIntosh in 2007 has different take than they did 30 years ago on cables.  (No they do not)

I'll take a look when I'm at RMAF and see if they're still clinging to the same theory...

One thing we've neglected to debate is the A/B switch itself.  I especially liked McIntosh's speaker wire selector switch.  That 30-yr-old switch might just impart a little of its own sound to whatever is connected to it... haha... That cracked me up. 

(Look at the prices of 30 year old McIntosh equipment, they hold their performance, value a little better than any cables, interconnects and power cords)

The testing procedure should be questioned and the methodology (what would you suggest?), music choices (music choices?), etc. needs to be decided upon... I'll be back in 20 years when that's all sorted. hahaha.

I think the list of links provided doesn't prove anything more than what's been said in this topic already.  There are a few tests and a lot of opinions... Similar to this topic.  Just like all adults, I know what I've heard and have made decisions based on my own tests.  I encourage folks to do the same.

So, yes, I'm summarily dismissing all of the links... (so give us a few links that show some sound affect?)  but I'm not trying to 'win' any argument... Just playing around with this silly thread while my lunch heats up...  This argument has 2 simple camps; those that have heard the difference, and those that haven't.  I can't make someone hear what I've heard and they can't make me 'un-hear' what I already have.  So, even if someone shows up at my house and I swap cables that have a definitive affect on the sound to me, the person who showed up can simply say they didn't.... Which has happened to me... Anyone ever asked their wife if they could hear a difference?  haha... If you don't want to hear a difference or don't know how... you won't.

So, does that mean I live in a fantasy land where I kid myself into hearing differences?  (many would say yes).... I have a trained ear that hears differences in many things... real-life experiences, instruments, people talking, audio systems... etc.. I care about what things sound like and I pay special attention.  How I hear changes over time as well... as do my tastes... oh no, a moving target of subjectivity!!! ;) 

I also care about how certain things taste, like wine and whisky... If a non-wine enthusiast drinks some wine it's usually either 'good' or 'bad' to them.  Much like audio... someone who listens to my system will generally say it sounds 'good'... sometimes 'bad' but not often. ;)  There is no granularity... the non-trained generally (like John Dunlevy, Gordon Gow and Russel Rogers, those are non-trained audiophiles?

(not always) can't hear that a voice sounds more or less real to them... they don't know how to compare that.  They can't focus in on different aspects of the performance and really find something to compare.  It's just a buncha-stuff.... same with wine.. tastes good, kind of sweet... tastes bitter, I don't like it.. not sweet enough... ;)

I still don't see why someone so adament about not hearing differences in cables (with no cited experimentation) is even participating on an audio hobbyist forum.  One doesn't have to drink your kool-aid to post do they?

If you're going to dismiss wires, why not deconstruct it all?  Why can't a cable-hater also dismiss every piece of electronics up the chain?  If they function their task within the limits, they shouldn't make any difference.  OK, lunch is ready... bye.

-C

Steve Eddy

  • Full Member
  • Posts: 877
    • http://www.q-audio.com
As a matter of fact, it forced me to re-check myself as I was critically listening to 2 different power supplies on my SB 3 this evening.

But since sighted listening tests are known to be flawed with regard to determining actual audible differences, why would simply repeating the same flawed test bolster your confidence?

Quote
The verdict? I most certainly clearly hear differences in the 2 power supplies.

Ok, but others say the same thing, with the same confidence, with many other things including rocks, clocks and photographs. So if you're so confident in your own perceptions, why would you not be just as confident in the perceptions of others?

Now, you can argue (and I think you have) that it's a question of probability. Which is more likely to produce an actual audible difference? A power supply, or a bottle of rocks?

That's certainly one way to look at it. But I think there's another, more germane way of looking at it. One which is also a question of probability. And that is, why do you seem to believe you're somehow much less likely to subjectively perceive a difference even if there may be no actual audible difference than anyone else?

Quote
Should I find the time, I would even try and record a two channel recording of my speakers with the different power supplies and burn it on a CD for others to hear. I'd love to do it, just dunno if I can find the time.

Why would you need to do that? The power supplies you're comparing are only powering the SB3, not everything else in your system. So why couldn't you simply make the recording straight off the SB3's output?

If you'd like, make two identical recordings, each using a different power supply on the SB3, and send them to me. I'll let you pick one recording or the other to use for reference. Then I'll make say a dozen copies, each randomly selected to be one power supply or the other. I'll send them to you and you can do your evaluation without any knowledge of which tracks are which power supply.

Admittedly this would be just single blind. But if the results turn out positive, it could be made to be double blind and repeated.

Quote
Let's not get this thread canned guys. K?

Or any guys canned for that matter. :green:

se


Steve Eddy

  • Full Member
  • Posts: 877
    • http://www.q-audio.com
This topic is so long, that I lost the 'trail' about 10 pages ago.  Steve Eddy must type 90wpm as topics he's in move muy rapido  :icon_lol:

Actually I did test at around 90 wpm when I was applying for a job some seven or eight years ago. But unless I'm just typing a one-liner or two, the amount of time from when I start a reply until I post it is far greater than counting the number of words and dividing by 90.

So it's not so much an issue of typing speed as time on my hands. I pretty much shut down for the summer to do some revamping and I've a lot more free time sitting around waiting for other people to get things done before I can get back to work.

Hopefully by the middle of next month you should be seeing rather less of me here. :green:

Quote
Frankly, this topic has wandered far afield and for quite a long time now.....please add some levity/good humor and a touch of insight and we'll keep it running.  If both fail to materialize, I'll close it and we'll move on to some other audiophool frivolity here on AudioCircle  :roll:

Hey, I've been sprinkling bits of levity amid my touches of insight. You must be reading all the wrong posts.  :green:

se


lonewolfny42

  • Full Member
  • Posts: 16917
  • Speakers....What Speakers ?
Frankly, this topic has wandered far afield and for quite a long time now.....please add some levity/good humor and a touch of insight and we'll keep it running.

Levity......


And Good Humor....


And a touch of insight (by Honda).....


...................................... :thumb:  :jester:

sunshinedawg

Chris that was really obvious, but extremely funny.  :icon_lol:

bpape

  • Industry Participant
  • Posts: 4465
  • I am serious and don't call my Shirley
    • Sensible Sound Solutions
Worlds shortest joke:

A dyslexic walks into a bra...  :duh:

Bryan

lonewolfny42

  • Full Member
  • Posts: 16917
  • Speakers....What Speakers ?
Chris that was really obvious, but extremely funny.  :icon_lol:
Thanks Sean....but I did leave one part off....the running part... :?


Daygloworange

  • Industry Participant
  • Posts: 2113
  • www.customconcepts.ca

Bill Waslo has an interesting program (free too) that you may want to take a look at. Hopefully that's not considered a cardinal sin.

cheers,

AJ

Can you provide a link? Thanks.

Cheers

Carlman


So, I'm a bloody wanker and should shut up and listen to Steve Eddy? 

He never said you need to listen to Steve Eddy. Personally I like the contributions of Steve Eddy, and jneutron et al. These guys have forgotten more about electrical engineering than I'll ever learn in my lifetime, so I value that they even take the time to give us real world data that is beyond our general knowledge. Which BTW, is why these threads are so valuable to me. It helps satisfy my hunger for knowledge.

se also forces me to think, and re-think my position on what I perceive when I'm critically listening to gear, and/or music. Also something I enjoy (dammit!).

As a matter of fact, it forced me to re-check myself as I was critically listening to 2 different power supplies on my SB 3 this evening.

The verdict? I most certainly clearly hear differences in the 2 power supplies.

Should I find the time, I would even try and record a two channel recording of my speakers with the different power supplies and burn it on a CD for others to hear. I'd love to do it, just dunno if I can find the time.

Let's not get this thread canned guys. K?

Cheers

I'm cool.. I actually like the contributions from se, et al.  I guess I'm around enough Brits to find the wanker-bit pretty offensive... Then the 'someome else put it better' comment just added insult to injury which I found offensive (after a long, frustrating day in the real world).... I haven't been able to make a post that really communicates how I feel accurately in a gentle or non-gentle way... I have to agree with Occam's assessment at this point. ;)

It's a new day, I've said all that I can say on the matter.  I'm glad there is some information in this thread that people find helpful. 

-C

Daygloworange

  • Industry Participant
  • Posts: 2113
  • www.customconcepts.ca
As a matter of fact, it forced me to re-check myself as I was critically listening to 2 different power supplies on my SB 3 this evening.

But since sighted listening tests are known to be flawed with regard to determining actual audible differences, why would simply repeating the same flawed test bolster your confidence?

se


Good question, and the answer is simple. Because as a recording engineer I've been doing it long enough to have a great number of reference points to make assessments as to differences between 2 things. I use certain cues and clues to tell me where those differences are most audible.

When tweaking sounds in the studio, we sometimes spend countless hours fine tuning on sounds. The great thing about the studio is you can do rapid fire testing. You have disable switches and so forth that enable you to do rapid fire back and forths. You also have programmable memory banks so that you can toggle back and forth between 2 modified programs of the same algorithm with minor tweaks.

For example, you can alter the pre-delay on a digital reverb algorithm for say, a drum kit. You can alter it by 10ms lets say. If you were to simply listen to the drum kit playing through the stock algorithm, then stop, scroll though the preset, alter the single parameter of pre-delay by 10 ms, then listen to the drum kit through this modified algorithm, about 45 secs would have passed between "takes". It would be hard to hear what the differences would be.

But, if you had the "stock" algorithm stored as a preset in a memory bank, and the modified algorithm as a preset in a memory bank right next to it, you just switch between the two, rapid fire, and listen. It is a great way to hear differences.

When you've been doing that for 20 years, there are a number of things that you know what to look for as cues. Frequency response, early reflections, transients and so on. It would be hard for me to decribe in writing clearly, but in a demonstration it would be easier.

Quote
And that is, why do you seem to believe you're somehow much less likely to subjectively perceive a difference even if there may be no actual audible difference than anyone else?

Just years of doing what I just described. It can be a curse though. It's hard sometimes to be a casual listener. But the same goes for being a musician. I can't listen to music without listening to the players and figuring out "what" they're playing while I'm listening. That's a curse as well.

Quote
Why would you need to do that? The power supplies you're comparing are only powering the SB3, not everything else in your system. So why couldn't you simply make the recording straight off the SB3's output?

 :lol: Y'know, it's funny....I posted my original idea first thing this morning, then as I was taking a shower it dawned on me to do just what you described. I'll just record the analog outs of the SB 3 into the digital recorder in my studio. No need to mic anything. Doh!!  :duh:

Quote
Or any guys canned for that matter.  :green:

Yeah, no need to kill the thread. If a guy posts something out of line or insulting, just remove his post from the thread, and notify him by PM to behave in the future. They'll get the hang of it pretty quick I'm sure.

Cheers






doug s.

  • Full Member
  • Posts: 6572
  • makin' music
ok, here goes:  good cable, w/o breaking the bank (i have no affiliation).  hand polished 4-nines 22ga pure silver in ptfe sleeving:

"PURE SOLID SILVER TRIPLE SHIELDED RCA AUDIO CABLES
One Meter Pair! Superb Sonics! Unrivaled Build Quality!"


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=230165623222




doug s.

Steve Eddy

  • Full Member
  • Posts: 877
    • http://www.q-audio.com
Good question, and the answer is simple. Because as a recording engineer I've been doing it long enough to have a great number of reference points to make assessments as to differences between 2 things. I use certain cues and clues to tell me where those differences are most audible.

Ok. But does simply having done things for a long time necessarily make one more immune to perceiving differences even when there may be none, or does it just serve to bolster what may be nothing more than a false sense of confidence? I mean really, how would you truly know?

Quote
When tweaking sounds in the studio, we sometimes spend countless hours fine tuning on sounds. The great thing about the studio is you can do rapid fire testing. You have disable switches and so forth that enable you to do rapid fire back and forths. You also have programmable memory banks so that you can toggle back and forth between 2 modified programs of the same algorithm with minor tweaks.

I'm sorry, but I don't see how simply being able to switch back and forth somehow makes one less likely to perceive differences even if there are none.

I'm reminded of a story related by Russell Dawkins, who has many years of experience as a recording engineer. He tells of how he spent some six hours tweaking the EQ on a CD mater. Throughout the process he was just as convinced as you are that he was hearing the differences in the EQ settings and "tested" this by switching the EQ in and out.

It was only after he was done and happy with the results that he discovered that the EQ he was tweaking wasn't even in the circuit. All he was doing was twiddling knobs and flipping switches while comparing one sound to itself.

So unless Russell's experience is to be simply dismissed out of hand, it tells us that neither years of experience nor being able to switch back and forth is a guarantee against being a victim of our own human nature.

Quote
:lol: Y'know, it's funny....I posted my original idea first thing this morning, then as I was taking a shower it dawned on me to do just what you described. I'll just record the analog outs of the SB 3 into the digital recorder in my studio. No need to mic anything. Doh!!  :duh:

:green:

se


AJinFLA

  • Industry Participant
  • Posts: 1115
  • Soundfield Audio Loudspeakers
    • Soundfield Audio

Bill Waslo has an interesting program (free too) that you may want to take a look at. Hopefully that's not considered a cardinal sin.

cheers,

AJ

Can you provide a link? Thanks.

Cheers

http://www.libinst.com/Audio%20DiffMaker.htm

As a matter of fact, it forced me to re-check myself as I was critically listening to 2 different power supplies on my SB 3 this evening.

But since sighted listening tests are known to be flawed with regard to determining actual audible differences, why would simply repeating the same flawed test bolster your confidence?

se


Good question, and the answer is simple. Because as a recording engineer I've been doing it long enough to have a great number of reference points to make assessments as to differences between 2 things. I use certain cues and clues to tell me where those differences are most audible.

When tweaking sounds in the studio, we sometimes spend countless hours fine tuning on sounds. The great thing about the studio is you can do rapid fire testing. You have disable switches and so forth that enable you to do rapid fire back and forths. You also have programmable memory banks so that you can toggle back and forth between 2 modified programs of the same algorithm with minor tweaks.

For example, you can alter the pre-delay on a digital reverb algorithm for say, a drum kit. You can alter it by 10ms lets say. If you were to simply listen to the drum kit playing through the stock algorithm, then stop, scroll though the preset, alter the single parameter of pre-delay by 10 ms, then listen to the drum kit through this modified algorithm, about 45 secs would have passed between "takes". It would be hard to hear what the differences would be.

But, if you had the "stock" algorithm stored as a preset in a memory bank, and the modified algorithm as a preset in a memory bank right next to it, you just switch between the two, rapid fire, and listen. It is a great way to hear differences.

When you've been doing that for 20 years, there are a number of things that you know what to look for as cues. Frequency response, early reflections, transients and so on.

Are you saying sighted tests are not flawed? Or are you saying that they are not flawed when you do them? Because you have done them for 20yrs ?

Quote
It would be hard for me to decribe in writing clearly, but in a demonstration it would be easier.
Agreed. Many folks have been saying exactly the same thing you have, but as Steve has pointed out repeatedly, no one has been able to demonstrate this in controlled listening tests.

Quote
Quote
And that is, why do you seem to believe you're somehow much less likely to subjectively perceive a difference even if there may be no actual audible difference than anyone else?

Just years of doing what I just described. It can be a curse though. It's hard sometimes to be a casual listener. But the same goes for being a musician. I can't listen to music without listening to the players and figuring out "what" they're playing while I'm listening. That's a curse as well.

This is the exact same thing. You have analyzed yourself to be a "better" listener - and found this to be correct.  :scratch:

Quote
Quote
Why would you need to do that? The power supplies you're comparing are only powering the SB3, not everything else in your system. So why couldn't you simply make the recording straight off the SB3's output?

:lol: Y'know, it's funny....I posted my original idea first thing this morning, then as I was taking a shower it dawned on me to do just what you described. I'll just record the analog outs of the SB 3 into the digital recorder in my studio. No need to mic anything. Doh!!  :duh:

Or any guys canned for that matter.  :green:

Case in point that even after 20yrs, sometimes external influence is needed.  :wink:

cheers,

AJ


Daygloworange

  • Industry Participant
  • Posts: 2113
  • www.customconcepts.ca
Good question, and the answer is simple. Because as a recording engineer I've been doing it long enough to have a great number of reference points to make assessments as to differences between 2 things. I use certain cues and clues to tell me where those differences are most audible.

Ok. But does simply having done things for a long time necessarily make one more immune to perceiving differences even when there may be none, or does it just serve to bolster what may be nothing more than a false sense of confidence? I mean really, how would you truly know?

se

Without getting existential, practice makes perfect. Although perfection doesn't exist (AFAIK, except in math), you can get very good at something if you practice enough, and have the aptitude.

So in this case, I can speak only for me, that yes, years of practice at engineering in the studio have made me better. I have the tapes to prove it.

Quote
I'm sorry, but I don't see how simply being able to switch back and forth somehow makes one less likely to perceive differences even if there are none.

You compare 2 samples against each other with as little reliance of human memory as possible. If I showed you 2 swatches of red fabric one at a time fairly quickly, you could spot quite small differences in color, hue etc... but if I showed you one now, removed it, then showed you the other one 5 minutes later, and all you had to rely on was your memory of the color from 5 minutes ago, you would have a harder time.

Quote
I'm reminded of a story related by Russell Dawkins, who has many years of experience as a recording engineer. He tells of how he spent some six hours tweaking the EQ on a CD mater. Throughout the process he was just as convinced as you are that he was hearing the differences in the EQ settings and "tested" this by switching the EQ in and out.

It was only after he was done and happy with the results that he discovered that the EQ he was tweaking wasn't even in the circuit. All he was doing was twiddling knobs and flipping switches while comparing one sound to itself.

So unless Russell's experience is to be simply dismissed out of hand, it tells us that neither years of experience nor being able to switch back and forth is a guarantee against being a victim of our own human nature.

That's just one instance. We don't know the circumstances surrounding it. Was he doing this during a bleary eyed 16 hour long session, where he was exhausted and his ears were fried?  Was he making infinitivally small Eq corrections in a really narrow frequency range?

I wouldn't run to town with that example. Hardly enough to confirm that human's can be easily fooled into thinking they're hearing something, when in fact they are not.

Cheers