You are so correct in your assumption shielded power cords are a must. Oddly just the opposite is true for interconnects, but that is another topic.
I have found that different PCs can make a difference, but it is always a, "More of," what is there. After all, we are talking about the transfer of raw power.
I have Shunyata PCs feeding my mono amps. I made the power cords for my preamp, the H2O Fire, and all other components. I used Belden double shielded cords, and Watco plugs from Parts Express. The shielded cords are necessary for all your gear.
Another fellow audio enthusiast brought over some $800 used PCS, and we all noticed a boost. I will find out which that was and get back to you.
I have found that different PCs can make a difference, but it is always a, "More of," what is there. After all, we are talking about the transfer of raw power.
I have Shunyata PCs feeding my mono amps. I made the power cords for my preamp, the H2O Fire, and all other components. I used Belden double shielded cords, and Watco plugs from Parts Express. The shielded cords are necessary for all your gear.
Another fellow audio enthusiast brought over some $800 used PCS, and we all noticed a boost. I will find out which that was and get back to you.