Power cords or power conditioner

+1 @marco1 that your speaker placement is probably playing a large part in this as your equipment seems perfectly capable of throwing a large, 3D soundstage.  I know you’ve played with placement already, but try this — pull speakers out another 2 feet from the wall and put them only 5’-6’ apart and toe them in so they fire just past the outside of your shoulders and move your listening chair back accordingly and see what happens.  If this yields a significant improvement try moving them out another foot (this is pretty close to how I have my speakers positioned to great effect) and see if it improves further or if you’ve hit the point of no/diminishing returns and go from there.  I have a feeling you’re going to experience a larger and more open 3D soundstage, but it’ll at least be worth a try and like you so aptly stated — it’s free!  Sounds like you have good PCs and while a good power conditioner can certainly help I’m not sure it’ll give you the level of soundstage improvement you’re looking for but always a good thing to add to your system regardless.  Hope this helps, and best of luck. 

Power cables YES.

Power conditioner NO

Wow, like all threads you have so many contradictory posts, but you can figure things out for yourself if you can return what doesn’t work. I think that @ghdprentice got it right. Even McIntosh wants you to plug your integrated amp into the wall, but notice the word "almost" in his remarks. Personally, I’m sold on Shunyata for power, but others look elsewhere, but with power cables, you are going to spend $6K to $13K on a conditioner and the proper cables just for your conditioner and integrated.. Now you enable the dynamics of your power amp and not dull the dynamics. For me, that’s not spare change, so I demanded a real noticeable..not subtle improvement. The problem here is how far do you want to take it? I still have to buy NR power cables for my DAC, streamer and phono preamp. I know that at $2400/cable I’ll have close to maxed out my system and I have bought into Shunyata’s Noise Reduction cables where component noise doesn’t contaminate other components. I purchased less expensive NR cables for my subwoofers and I think this worked well, but buying more $2400 cables is tough.  So the problem with conditioners/regenerators is that you have to spend a small fortune to do it right.

Why not both, power (distributor and cables) and room treatments. And honestly implementing room treatment is relatively inexpensive in the grand scheme of things.It just needs a lot of work. For me, I gotten everything I could possibly need, goods and advice, from GIK Acoustics. And of course, speaker placement, toe in, distance from listening position, etc. which are of course …. Free. Just some work.

From my own experience with real people, those who proclaim power cords and conditioners make zero difference, and room is all that matters, typically have zero room treatments in their rooms. They just love to bash cables. As they say, don’t pay attention to the preaching of a naked priest. Or something like that.

“Why not both,” is because the power cord and conditioner cannot fix a room, nor fix placement.

One cannot change the physics of the room interaction with a high $ cable.

Secondly, it is better to do the things have have a greater impact first, as well as the things that do not require a trip to the store.

Cleaning corrosion off the RCA/XLR and speaker connectors… and making sure that outlets connections are tight are some of the things that can make a difference. But moving a speaker almost always has a huge impact. And it can take hours or days of futzing around.

Once all that is done, I stop… But I am more of a cable denier so there is that. But a believer should probably start their cable search when the system is “as right as it can be.” And not start with cables and power conditioners as a strategy to fix and room and speaker placement issues.