Why power cable effect overall syste sound?


Power cables effect the system sound. This is a well-known fact. My question is why.. specially in case of low power type "A" amplifiers where current is constant. In my single ended 300B the cable creates huge difference. Does it points on power supply PSRR issue? Actually in case of well designed power supply, the power cable should not introduce any improvement. We are spending hundreds of dollars for the 1 meter of cable from outlet to IEG socket where meters of cheap wires running in the walls and it does work. The answer on this question is puzzling me.
abronfer
Rrog,

I can appreciate your POV and comments. It good to see someone toss in some intelligent context instead of kindergarden size tomatoes--which is what I think the other poster was referring to. I would simply add a few points having read your opinions.

ARC no longer hard wires their electronics and openly endorses some aftermarket power cord designs. They also use aftermarket cords in the testing and development of their electronics, as do many major electronics and speaker manufacturers--the list is very long. These same companies also use aftermarket power cords at major trade shows. There are also countless film and recording studios at the top of the food chain who relentlessly test every facet of the systems that provide their living--and have selected aftermarket power cord products. Bob Ludwig's use of Transparent Audio products is one of dozens of examples.

Belden manufactures standardized power cords in many types and sizes to suit major accounts considering the fundamentals of safety, various connection types, wire sizes and current rating. They maintain great testing and science labs to ensure failure proof designs that will qualify for UL rating. They do not address EMI/RFI rejection or minimize impedance ratings, reactance levels or anything that could be considered performance rather than safety oriented.

I do get the point though that some may find that too many high-end power cords do too much to alter sound rather than improve it and go back to Belden out of frustration. To posit that power cords make no difference however is a difficult position to maintain given simple scientific explanations for their function and thousands of credible experiences. That was what all the dust was up about in this and many threads like it.

And as far as "some guy making cables in a garage" as your comparison, sure there are outfits like that. This is in part what makes life difficult for people choosing products of any type--- especially cables and power products. Anybody can make cables and start a business so its up to the end user to use common sense in his selections for trial.

There are more than a few companies with massive scientific infrastructure, testing labs, US factories and brilliant science minds behind power cord products that are performance oriented and also have UL ratings. It is no easy feat to get into and stay in such a competitive small market for any length of time without making products that hold some intrinsic and broad value.

Everyone is entitled to their opinions and has a right to share them, especially when thoughtfully explained. You are thankfully one of the few that doesn't toss poorly constructed epithets and run away like they are playing a neighborhood game of ring and run.

Regards,

Grant
Shunyata Research
I’ve never tried anything but stock power cords on any of my gear so not sure if they would improve things or not. But if I tried to figure it out from this thread, well…fuggettaboutit!
To me, this type of thread is exactly what cable manufacturers want. When this gets hotly debated, each side amps up even more. Instead of writing about subtle improvements you get people writing “I was shocked” and “My wife walked in the room and asked me what I did to my system” and “My non-believer buddy came over and his jaw hit the floor.” This has got to be gold to a manufacturer regardless of what the naysayers are writing.
We are talking about the AC from the wall fellas. If the cord changes that 50 or 60 cycle waveform then the manufacturers can figure out a way to show me that. I’ve read their websites, and believe me they can be very creative in their marketing. But go to the “Technical Specifications” (or similar) page of their sites and you get more marketing, no data, no proof, no before and after waveforms. Why not – It’s bad for business, that’s why. I’m not saying they can or can’t prove it, but whether or not a cord does anything and whether or not this can be proven will remain to be debated because the manufacturers have no reason to prove anything.
And btw – The reason why this thread has gotten so much attention is because the OP stated “Power cables effect the system sound. This is a well-known fact.”
The manufacturers had to give into the demand for detachable power cords to stay in business.I was told that some wanted to keep their hard wired cords but had no choice.The IEC connector used is disliked by many,including people that use aftermarket power cords.
There are also power cord builders that make a claim"UL APPROVED" that must not have any knowledge of the laws or products they are supplying.How could you trust them when they make a improper claim like this.Power cords are not "UL APPROVED".A popular company does this.