HiDiamond Power cords...

Fascinating... Fancy seeing you here Harve!

Bacardi and Fplanner, thank you guys, I was one of those skeptics of the Hidiamonds in the beginning of their rollout in the US - no audition, a lot of praising . .. Long story short, now I have a loom of Hidiamonds for my all system that includes XLR 3, HD 8 SCs and P3 power cords.
One power cord connects Wall ac to power distributor and other two go from the distributor to CD player and amp. For now I have budget only to upgrade one power cord to p4. Which one do you think most critical/effective in my case?
Thank you.

@Denon1, try the P4 from wall to power distributor first. Let it break in the hours it needs(400-500 max). You have P3's everywhere else so it's pretty easy to swap later to amp or cd. Have fun with it and find the most notable positive effect/differences possible and enjoy........

PC to the CD player.

Fplanner2000, Bacardi, I have tried the P4 from the wall to the power conditioner (Audience) and it is am improvement. But, my CD player (Cary 306 SACD) is also my Dac, so perhaps Fplanner2000 point about using the P4 on the CD player would be the better place.

But then again, my Preamp may benefit with the P4 since everything eventually goes through it.

It is difficult to just swap the cables behind my Audio racks but I will try this weekend.

Anyone else have any experience as to where the best placement for my single P4? All my other powercords are the P3's.