Monoblock power amps same dedicated outlet?

Looking for input whether putting both monoblock power cables into same dedicated line outlet receptacle is ill advised.

Always best in the same highest quality outlet, as if in different ones there is a chance of creating an earth loop with the household wiring, and you may get hum or slight hum.

Cheers George

Ill advised? No. But you won’t get optimum performance into low impedance loads, even at moderate loudness listening levels.

I agree with georgehifi and the advice from Michael Fremer in the video from millercarbon, the amps should be on the same ground plane to avoid a ground loop hum.  Speaking from experience here.

The guys at Reno HiFi told me that Pass Lab amplifiers do not employ a ground reference at the speaker terminal which makes them "less" susceptible to ground loops.  Therefore, if you are running the big Pass mono block amplifiers, they recommend separate dedicated lines.  I get the argument for one dedicated line for the whole system, but some amplifiers may over tax the circuit. 

You should certainly try it both ways—amps in single outlet vs separate outlets—-and reach your own conclusions.  Each system may react a little differently. 
In my system, using tube monoblocks, the sound with separate outlets is slightly brighter, slightly leaner, slightly bigger and more spacious, slightly recessed in the mids, and slightly more exciting.  With both amps plugged into the same outlet, the tonal balance is more linear, more coherent, but also slightly smaller and less exciting.  
In past years with some different tube amps and different speakers, I preferred the sound with separate outlets.  With my present setup I hear the same types of differences noted above but overall I now prefer the single outlet.