Enough noise reduction?

@yage nice!

what makes them better is the rectangular shape of The wire greatly reduces the skin effect,

@urbie 

But I thought that skin effect was mostly something affected high frequencies and the power cord is 50 or 60 Hz?
As we approach DC the entire conductor is in action… all the way down to its very core.

another tweak you should look at is the Townshend podiums

^This^ is happening after the electrical signal is launched into a air as an acoustical field… so is a bit outside of the electrical system noise.

I highly doubt that Stereophile and ASR are using lab power supplies for their measurements.

@yage and you would be wrong.
(Not for amps, but for the front end gear tests… I believe that you are right for amp testing.)

If I did not attract a 2 weekban there I could look it up, but it is mentioned a some of the videos.

This thread had made me realize that a measurement not usually taken or published is power supply noise reduction ratio.

We get the S/N+THD specs, and these assume ideal AC power.  We also should see something like how well AC noise can make it to the audio outputs.  Not an impossible test.

Yeah @erik_squires Probably a test for both for a voltage field, and for a current field would be good.

@holmz 

I'm still doubtful a lab power supply is used. It just doesn't make any sense. A lab 'bench' power supply provides DC, not AC. Also, these components are consumer products meant to operate off of standard household power. If you want to measure and test them, wouldn't you want to know the performance given wall power?

No, I don’t think so.
One would want just the noise and distortion from only the unit.

But many would also want to know how the unit operates with dodgy power.

Since we do not know what different cities, countries, and individual houses power looks like, then the easiest is just use pure sine wave power.

Sort of like Jiminy cricket, they whistle when they work? @terry9 

if you're going to get power cords the best ones to get are the rectangular OCC single crystal wire even better than the round OCC single crystal wire.

What makes them better @urbie ?