Is this the best way?

I changed out the PangeaAc9se mkll for the ps audio power plus sc from the wall to the conditioner.results....more detail better mids.the ac9 was more muddy and less detailed

I have the same APC 15, but it’s in my living room system which is a 5.1 for television and movies. Have never tried in a 2-channel system. With this said, and from my recollection, this particular unit was made for media/HT systems. Long ago I tried many power conditioners and this was the only one that simply protected and didn’t kill dynamics. 
Couldn’t hurt taking it outside of the equation to see what happens, though.

+ 1 @noromance 

Some PC's are detrimental to the sound. I know APC makes computer surge protectors which I have heard do NOT make a good Hifi PC. The question then is whether this is a rebadged computer PC or a real Hifi PC made for hifi. I have no idea but I know it happens in other products.

Have you tried before and after with the APC15? 

Sounds good!