Owenlee, sorry for the delay, I were having a very good vacations in the beautiful state of Tennessee.
In my experience I have found that if you have a very detailed dac or source that the power cord can affect them the most. I believe that by adding the P4 to the Powercell made such a huge difference because I completed the HiDiamond chain or complete loom. You really do not realize how good the HIDiamond cables are until you try and take them out. I had tried several times to go back to my previous reference cables for a listen and it is a disaster every time. I have now sold all my previous so called reference cables and have no interest in playing the cable game anymore. I will need 1 more P4 when my master clock arrives and post on that experience but as cables go, this manufacturer is the best I have used in my system.