Then carefully buy 1 power cord, start at source, including DAC ( unless you are stuck in music prior to 1985, at which point you are trapped in a small world of your own and maybe haven’t listened with an open mind... )
listen...
some are worse....
also Hospital grade Hubbel outlets are great low cost improvement as are wood outlet covers vs plastic or worse metal...
listen...
some are worse....
also Hospital grade Hubbel outlets are great low cost improvement as are wood outlet covers vs plastic or worse metal...