Can a power cord increase the resolution of an Class D (SMPS) amp by more than 5% ?

geoffkait states:

You’re right about one thing, the AC current does travel in both directions. But only one of those directions is audible. See if you can guess which one. A prize for the right answer.

So what about one of our favorite amp specs, damping factor which is because Speaker diaphragms have mass, and their surroundings have stiffness. Together, these form a resonant system, and the mechanical cone resonance may be excited by electrical signals (e.g., pulses) at audio frequencies. But a driver with a voice coil is also a current generator, since it has a coil attached to the cone and suspension, and that coil is immersed in a magnetic field. For every motion the coil makes, it will generate a current that will be seen by any electrically attached equipment, such as an amplifier.

The amp has to absorb current generated by the the speakers to be able to control them.  The direction arrows on your wires seem to point wrong 50% the time for this fundamental part the the circuit that the speakers are a part of.  

Well for some us the world is flat and others its round.

If you dont understand how electrons play a roll in an electric circuit how can you understand that arrows on a wire are meaningless.

60 hertz(meaning the current changes direction or polarity 120 times, or 60 cycles, a second). (In Europe, line frequency is 50 hertz, or 50 cycles per second.)

What is the definition of a "strawman argument"?  If you mean my point is based upon real science and understanding how AC current actually works and not some vudoo marketing pixie dust that this comment is based on:

"Ideally all cable manufacturers should control directionality for all of their cables, power cords, HDMI cables, interconnects, digital cables."

I would not want ANY cable in my system, home or data center that I work in that claimed to control directionality and as it turns out I don't and none of my other audio friends do either.

geoffkait, you need to take a course or study the fundamentals of AC ie ALTERNATING CURRENT.  

The electrons in an AC circuit don’t really move along with the current flow. Instead, they sort of sit and wiggle back and forth. They move one direction for 1/60th of a second (60 Hz in the case of the US power system), and then turn around and go the other direction for 1/60th of a second. The net effect is that they don’t really go anywhere.

The electrons initially move in one direction, but then REVERSE themselves and move in the other direction (opposite the arrows on your wires).  The back and forth movement of the electrons in the circuit continues as long as the voltage continues to reverse itself. 

How can this company understand directionality in a place (AC current) where it does not exist?

geoffkait

You have lost us with this quote!

Electrons are only charge carriers. The signal, the thing traveling through wire at super high speed, is photons. Pop quiz: do photons have mass? Maybe you should get your money back from the high school you went to, with your friends.

How in the world does a particle of light ie a  photon, have anything to do with a electircal wire??  How would a particle of light move on a wire??

Do me a favor, go up to your local Home Depot and visit the wire department and ask them for some "directional" wire for your 15 or 20 amp circuit, see what they say??

geoffkait

Share with us the physics of how a photon, a particle of light transfers on a wire medium?  Also, please share with us the college that taught you this amazing fact of physics!

To answer this question, photons are the energy-packets that carry the light energy. Beams of light are made up of photons

In the US the "signal" would be a 60hz sign wave and at 120v

The concept of a dielectric conducting any signal in the audible spectrum of 20-20hz is ridiculous 

As frequency increases, the Dielectric starts exhibiting shunt resistive losses which can be measured and quantified as signal loss across the termination load. Fortunately for our application (audio) these shunt losses don't begin to surface until frequencies much higher than the audio bandwidth.

mr_m

anyone who buys or considers buying a >3K power cord should have their head examined and fully deserve to have their wallet drained.

absolutely absurd that anyone would buy something like that!

Its interesting that no one has been able to measure what they claim to correct but somehow it can be heard.

I was at one of the local very high end audio stores listening to a pretty high end system, Wilsons, Audio Research and a Linn Klimax source.  The sales guys started doing something with the Linn asking me "do you hear that" then doing something again "do you hear the difference".  I did NOT know what was doing at that time and as it turns out could hear NO difference.  after 5-10 minutes of this he gave up and I finally asked him what we was  doing.  Turns out he was switching the ethernet cable with some unknown cable to a fancy, very pricy (no arrows though) >$500 CAT? cable. I started laughing because I really could not hear a difference and should not have.  I asked what the unknown cable was, CAT5? CAT5e, CAT6 and what there network was, 100m, 1g etc He DID NOT know and he didn't know what the fancy cable was either.  He claimed he can hear the difference and will be selling lots of them his customers who spend $25K on a Linn Klimax.

ampzillaOne

You mention "dedicated copper ground rods", are you suggesting these be installed in a separate location?  If so, that would violate code and create a nasty ground loop potential.  Other than that I very much agree with your suggestions.  For my setup I have a dedicated 20amp circuit for my audio system.