Koei
100+ Head-Fier
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- Mar 11, 2009
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There must be some terribly designed systems out there if power cables make a difference.
There must be some terribly designed systems out there if power cables make a difference.
Yep, it's possible for an AC power cord to act as an interference antenna (either transmitting or receiving). While possible, it's not very likely, several things have to go wrong at the same time. The cure is almost Black Magic. Just changing things or moving cords around can change the problem.They make a difference. Just not anything to do with the audio frequency spectrum in audio reproduction.
It wont have any influence on the piece of gear the cable belongs to. If it does the power stage sucks.Yep, it's possible for an AC power cord to act as an interference antenna (either transmitting or receiving). While possible, it's not very likely, several things have to go wrong at the same time. The cure is almost Black Magic. Just changing things or moving cords around can change the problem.
Things that can impact the problem:
a] AC cord length
b] AC cord placement or dress
c] what hi-fi components are On or Off.
d] hi-fi component placement
e] what near-by appliances are On or Off
I'm of the school that cables make very little difference unless the cables being used are underrated. But, the OP was asking about earbud cables, and those (1) tend to be exceedingly small diameter where you can run up on issues; and (2) could potentially operate at low-enough voltages that capacitive effects begin to matter. I haven't seen a discussion of the latter here, but that would basically cut down on the very highest frequency sound.
Resistance in the line would tend to cause a smooth phase shift in the signal as the frequency goes up. That should normally be undetectable, but maybe... this might mess with imaging. The brain does use some phase information in imaging, but I don't know the details of how.
sure. read: https://www.electronics-tutorials.ws/accircuits/ac-inductance.htmlEvidence please?
sure. read: https://www.electronics-tutorials.ws/accircuits/ac-inductance.html
Note R is fixed and Z is a function of frequency. The phasor diagram will then make evident how this happens.
I don't see anything about the sound of anything in there.
On what specific part of my post did you want evidence? The frequency response? The resistance of small wires? The use of phase in stage? Can you be more specific?
Evidence that the wire could have an effect on the sound.
So certainly you agree with the idea that resistance by itself will reduce the voltage to the drivers and thus reduce the volume. So that is /an/ effect - just not a serious one because we can turn up the volume to compensate.
The more advanced issue I mentioned is phase information. Here's an article about it in a very good journal: https://doi.org/10.1146/annurev.ps.42.020191.001031
FWIW, I don't own any fancy cables... I use stock cables because I think they're good enough. But I am simply explaining where the theoretical concerns lie.