I don't know if many here address the electricity going to their gear as much as I do, but what I have found is that the D amps that I own need the best power you can give them to sound their best.
That means the less you do to clean up the power to your amps(and whole system)the worse they will sound.
I recently did some more upgrades(I am firmly in the Shunyata camp)and the improvement to the sound of my system only let the clarity of my D amps(Red Dragaon Leviathans)shine thru.
I was pleased before, but really impressed afterwards.
The Red's will sound nasty if you feed them nasty power and sources, they are revealing, and if other D amps have the same traits, then perhaps those who do nothing to clean their power(dedicated lines, power conditioning,power cords)have heard the nastiness and attribute it to the D amp .Thus a myth about the poor sound of D amps is taken as part and parcel of all D amps in all systems.
It would be interesting to hear from others who own D amps of their stories and findings concerning the power being fed to their amps.
And I am curious if those who have found D amps not to their liking use any type of power conditioning , dedicated lines or upgraded power cords.
My Reds use Shunyata Annaconda Helix into a Hydra 2, ,the hydra 2 is connected to a 20 amp wattgate which is wired at the panel with 10 guage Romex of about 10 feet in total length.
Front end gear is on another 20 amp line, into a Venom plug, then 20 amp Annaconda Helix to the Hydra 8.
As I mentioned, before I went this route I was happy with the sound of my gear/amps.
Now I am very pleased.