Good outlet for amplifiers

@pinball101 Wouldnt I get a better connection, at least to the first outlet, by going directly into the outlet rather than creating a pigtail in the box? That’s what I was thinking and why I would Daisy chain. Because the most important outlet will be the first one where the two amplifiers are set  also, this quad installation is the end of a circuit… So I’m not too worried about other outlets further downstream.

I can't speak to the benefits of direct connection vs the pigtails in line with the connection.  But based on your configuration being at the end of the circuit, I would not bother with the pigtails either.  

I'm not familiar with the isolated grounding you are referencing so I can't speak to that either.

@peter_s 

Another vote here for the Furutech GTX-D NCF(R) outlets.  I found very favorable sonic improvement of this outlet over a few other audiophile grade outlets.   

Regarding the ability to daisy chain from one Furutech to another, there are two sets of lugs to wire to on each unit.  A better way to extend to a second outlet would  be to pigtail separate leads to each outlet in the same box, or to extend the circuit to a separate box.  This way a loose connection does not affect downstream outlets.  Just did this on 1000’ of romex for four separate circuits and 22 outlets in my basement at the recommendation of my electrician.  If there is a problem with a loose connection for an outlet it will be at the outlet instead of the possibility of an upstream connection.  

Admittedly, the Furutech outlet doesn’t have the tightest connection.  But the sonic improvement easily offsets that.