Power cords

When I read the op does not have any high end duplex.. With those powercords? Anyway, I would strongly suggest before different powercords, you try a few duplex outlets. Compared to powercords even the very best are cheap. ($280 a pop and down).I use Pangea power cords. Which run from $50 to $450.for 4m. So really budget. And I bought a pile of Furutech duplex to try. They do make a big difference.Particularly removing a distortion I found when I put back some brass plugs. Now it is gone, I can hear it when I put them back. It is particularly in the upper midrange, like a velvet fuzz added behind the notes. Anyway, I would suggest researching some Duplex.

I’m going to give great advice that would serve ‘me’ well. You love what you have so changing cords, not mentioning cost, is not a good idea.
At first you’ll listen more intently ‘ hearing things you’ve never heard before’ then find something that’s not perfect. It’s never going to be perfect and you are already in a good place. FWIW

folkfreak
I checked out your set up....very nice!  Interesting but in my room the Black Box does what its supposed to,bass is not just more defined but cleans up mids and HF as well...more focused and defined.  I had an extra 4" GIK absorption panel that I inserted between my listening seat and the Monster bass traps....good call as it definitely created more separation and  "cleaner" crisper mids and highs.  One of my favorite pieces for soft mids and guitar work is Wicked Games by Chris Isaac and with the absorption panel it is even prettier and I can clearly make out the refrain which was not always the case.   BTW I did order a Galileo UEF pc to power my PowerCell 12 UEF...looking forward to evaluating it's impact.    Thanks for the input.

elizabeth
Good call, my bad.  Something I've neglected.  I do have a SR Black duplex feeding the monoblocks but nothing on the front end side.  I've taken David Pritchard's and your advice and ordered a SR Red and SR Blue to evaluate.
Thanks to all

@ptrck887 thanks for the update. Glad the rear wall treatment worked for you. I agree on the effect of the Black box, it’s very impactful across the frequency spectrum, just in my case a bit too impactful if you know what I mean! 

I’ll be interested to hear how the upgrade to Galileo cords on your power cells works out, mine are just stock so far so I could have this upgrade in mind

Moving power cords around, found the spot for my home made with Furutech '28' plugs. To the Bryston BP-26. Moved the 4m Pangea AC9SE mk2 Sig to the Conrad Johnson ACT2.         
One of my current problems is do I move the Furman power conditioner? I used to use it for the amp too. But not anymore. I could move it closer to everything else(with a little work, actually a LOT of work, moving the TV stand just six inches over, is pita.(need to empty it etc)   
I need to decide before buying any long PC. Since moving it will take off two meters in general for all PC going to it at the main rack since they no longer go behind the TV rack..  
Sadly I am like really lazy, and waffle. I will waffle waffle waffle until the cows come home.The big news (with the PC as they are now) is I can hear singers and particularly Jazz trumpeters angle to the microphone or away. Never really heard it as clearly as now. Now it is plain as day.