PS Audio AC-5 question

I recently bought PS Audio AC-5 power cord for my Parasound HCA-1205A amp. My pre is Anthem AVM-20 with Shunyata Diamondback power cord. My speakers are Paradigm Studio 60 v.3. When I changed the power cord of the amp from stock cable, I found that the overall sound is more forward than I would like. Also the top end has opened up, but I feel it to be a bit harsh - to the face. Not sure what is the issue. Is the PS Audio AC-5 a worng choice to Parasound amp?.