How do you tell how dirty your power is?

One aspect not mentioned is that the manufacturer designs and tests the equipement.
Do they test with "perfect sine wave power? Or the power coming out of the labs socket?
My adventures in power conditioning lead me to believe that some scuzz in the power IS NEEDED!! to sound the way the manufacturer intended.
Too clean and thin a sine wave and the sound becomes as said! "lifeless"
This is a difficult area to know just what the designer used for power: clean? dirty?

Elizabeth, is this tongue in cheek?

The harder you are,the dirtier it is.....unless your from Fort Apache or Queens..jhds7w9le,mnbs/.q926bswjmy5qG^&..sorry,just lost it there for a sec...

Audiofeil has it wrong! That's for RFI. lol

if you have a laptop, play some music through your system with it plugged in, then during a soft passage unplug it letting the battery power the computer. i can hear all the noise in my ac with the computer plugged in and it is dead silent with it running in battery. very simple test. btw, if you have a power conditioner(i do) make sure you don't plug the computer into that but directly into the wall.