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Guy exposed cable salesmen tricks, gets kicked out of audiophile society
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Old 11th July 2018, 05:33 PM   #31
hudelson2 is online now hudelson2  United States
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How in God's green earth is a couple of meters of expensive power cord is able to filter out hash and voltage variations? The electricity has traveled through kilometers of power lines and into the home with indifferent wiring quality along with devices that generate hash and somehow an expensive power cord could make a difference.

If you are a do-it-yourselfer money could be better spent on a better power supply. Or money could be spent on power conditioning units. I guess the ultimate power conditioner would be a motor-generator set.
 
Old 11th July 2018, 05:58 PM   #32
tomchr is offline tomchr  Canada
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Quote:
Originally Posted by hudelson2 View Post
How in God's green earth is a couple of meters of expensive power cord is able to filter out hash and voltage variations?
The only difference I can possibly think of is that the expensive cords tend to use heavier gauge wire, hence, provide a better connection of the chassis grounds. In a single-ended system, this could reduce the error currents flowing in the RCA shields as this current would prefer the lower impedance of the power cable ground. It's a bit of a stretch, but still within the realm of physics.

There are a few ways to deal with this. One could use differential signalling. That's the most effective approach. Another approach would be to connect the grounds of the various pieces of equipment with a heavy gauge wire. AWG6 grounding wire is available at your local home hardware store for a lot less than the unicorn power cords.

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If you are a do-it-yourselfer money could be better spent on a better power supply. Or money could be spent on power conditioning units.
Or one could use a circuit topology with high power supply rejection ratio.

Tom
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Old 11th July 2018, 06:17 PM   #33
jackinnj is online now jackinnj  United States
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Guy exposed cable salesmen tricks, gets kicked out of audiophile society
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Originally Posted by billshurv View Post
On Day Two of CES 2018 Proof That A.C. Cables Make a Big Sonic Difference | Analog Planet . This has level differences. The samples were analysed in the snake oil thread.
Michael Fremer -- same writer who waxed eloquent on the SMc Audio Nexus $20,000 power conditioner in June 2018 Stereophile. (btw, the product doesn't seem to be on sale.)

"What the SMc Nexus AC Nexus did to the sound of my system was something that I easily heard but that probably also cna't be measured."

Good, bad or just different?
 
Old 11th July 2018, 06:30 PM   #34
scott wurcer is offline scott wurcer  United States
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Quote:
Originally Posted by jackinnj View Post

Good, bad or just different?
Fremer has an agenda, no doubt about it. The physicists at Fermi labs should start some experiments to figure out the sound of cables.
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Old 11th July 2018, 07:18 PM   #35
bwaslo is offline bwaslo  United States
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Guy exposed cable salesmen tricks, gets kicked out of audiophile society
Quote:
The only difference I can possibly think of is that the expensive cords tend to use heavier gauge wire, hence, provide a better connection of the chassis grounds. In a single-ended system, this could reduce the error currents flowing in the RCA shields as this current would prefer the lower impedance of the power cable ground. It's a bit of a stretch, but still within the realm of physics.
Not a stretch at all, I've run into this numerous times and it's easily measurable, sometimes heard as a buzzing sound, or the not-at-all-rare low level hum that comes and goes when different gear gets connected together. The thing is heavier gauge ground wire on a cable can make the interference lower or higher, depending on where the noise is getting injected into a chassis. The current across the shield/return might go up or down as it gets shunted around the cable returns and safety grounds.

No way it's going to cause a 2dB level difference (or any level difference in actual program).

The "slightly higher volume" trick isn't always intentional, either. Demo something that's supposed to make a difference to someone, first let them listen to the "before" (new magic stuff not in the system). Then let him listen to the "magic change", and let him control the volume knob himself -- he's likely to turn the second listen up a little more to try to hear into what the difference might be, not even aware he's doing it.
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Old 11th July 2018, 07:28 PM   #36
irribeo is offline irribeo  Netherlands
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And here we share our wife walked into the room asking what we changed that made this improvement to the sound she is hearing.
The audiophile doctor replaces the wife for an anonymous person that happens to be using an app on a mobile that happens to show what he in a more doctorly manner calculated using proper equipment...
 
Old 11th July 2018, 10:02 PM   #37
Hearinspace is offline Hearinspace  Canada
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Guy exposed cable salesmen tricks, gets kicked out of audiophile society
'Careful boys! Is the argument that there can be no difference to hear any significant amount better than the argument that we're somehow defective if we don't hear one?
 
Old 11th July 2018, 10:10 PM   #38
bwaslo is offline bwaslo  United States
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Guy exposed cable salesmen tricks, gets kicked out of audiophile society
It's not "no difference to hear", it's "volume level can't change from a power cord" in reasonable operating conditions.
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Old 11th July 2018, 10:27 PM   #39
Hearinspace is offline Hearinspace  Canada
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Guy exposed cable salesmen tricks, gets kicked out of audiophile society
I have no argument with you there. There was just a whiff of smoke from a different fire.
 
Old 12th July 2018, 12:12 AM   #40
Charles Darwin is offline Charles Darwin  United Kingdom
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From what I read it was an AudioCon event.

Turns out it really was, wasn't it?
 

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