Black Blackground for Monoblocks

I recently upgraded my Octave stereo RE320 to the Octave MRE220s and really like the better separation and more power that the monos bring.

I had my stereo amp plugged in to Stromtank 1000 and even though I lost a little bit of dynamics I found the stromtank provider a terrific quiet, black background and better image separation for the amp. Now that I have the monos I tried to do the same but I believe they are pulling too much current because I’ve found a pretty substantial reduction in dynamics even though the background is quiet. I’ve decided to plug the monos direct in to the wall which sounds great except you can tell they are just not as quiet as they use to be.

I’d like to find a way to bring that quiet background back without compromising dynamics. Since I have mostly audioquest dragon and Hurricane powercord my dealer recommended that I buy a Audioquest Niagara 5000 and plug it in to the stromtank. I can then utilize the high current outlets on that for the monos.

I don’t know if I want to go that direction or not and have been considering trying the Nordost Qkore or the Chord Company GroundAray devices. They seem to have good reviews.

Any thoughts or suggestions would be appreciated.