Let's talk power cords

Oh, that's nothing - the After luke power cords  are much better than the After mark ones

Not at all likely, spendy AC cables are a scam and they do not make a difference on well designed equipment.

But the confirmation bias is easily heard.

The only way an elec. signal can make across a transformer from 1o to 2o is by EMF (and leakage thru gnd). Good transformers will have a shield between those windings.

If there is a an issue an AC power cord helps with, then you need to rewire your entire house - maybe get the elc. co. to rewire back to the substation too.

BETTER solution is to buy an isolation transformer that a hospital has removed from service - they are all over eBay and cost $300 or less - I know a guy who got an xlnt one for $75.

You then get a simple, plain power strip with no devices inside it, and plug everything into that to get rid of gnd. loops.

DC power cords from wall warts can still be an issue - make or buy a star quad DC power cable to reduce that issue & galv. isolate your DAC.

Lots of real ’tweeks’ to do and they are not spendy. No reason to buy overpriced snake oil.  Science is well able to explain and measure these sonic variables.

When observation isn’t supported by current science (in part, a body of "rules" or principles that help us understand, order and predict reality) the rules have to be amended to include confirmation bias as a cause.

Lousey observations are of no consequence to scientists - it is why we do CONTROLLED experiments

experiential confirmation bias

Good thing you are not allowed near drug development labs

Peer review is designed to slow down the output of BS - that is its function.

try an isolation transformer !!

pay little attention to the above