Symptoms of UN-CLEAN power

When talking about CLEAN POWER, what SYMPTOMS or effects are caused by DIRTY or UN-CLEAN power? 


Power transformer hum, very faint static noise at 0 volume, fuses blow often, and possibly other malfunctions.

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My take on symptoms of 'Dirty power'.


RFI - Harsh sound, Grey background, Sounds that blur with each other. 

EMI - Weak & untight Bass, Small stereo image. Missing the Boogie Factor

Leakage currents - short decay of sounds, obstructed sound (can be minimized with correct phasing of equipment)

Too much shielding - splash sounds on cymbals, congested & choked sound

DC - Missing Oomph, Tiny bit of distortion on the transients. General lack of naturalness. Bassdrum that sounds like 'Bonk' instead of 'Bup'

General observation: More capacitance = less high, More induction = less bass.


Love to hear other peoples descriptions.