...Grounded or Ungrounded Power Cords...


Hello to all...

I've noticed that there are choices by different manufacturers for grounded or ungrounded power cords: 

Why would this be important?

With exactly same construction - do they sound different?
insearchofprat
Post removed 
Post removed 
"It was the Audio Envy site that led to this question..."

No reflection on you whatsoever. Hopefully, the discussion of safety-related issues with ungrounded power cables has been informative.  
Post removed 

I have 1 thing to add to this discussion. My amp will HUM loudly with a ground pin. Over 10 yrs I have tried everything to get around this problem, but, the only answer is to lift the ground pin. I have had this same problem with other amps as well. Probably has something to do with my electrical grid, but there it is.