I did not change the power cable but there’s nothing wrong if people try that. And yes there may be differences. The fact that you can’t hear it or measure it means nothing. Live and let live.I tried many cable including rca, speaker cable, optical and coax. None was ever made improvements. To back my claim, read aidioholics about cable using audio precision. If you could hear it you could measure it. They should not changed the sound otherwise it’s coloring the music. Cable job is garbage in garbage out.