Sound quality improvement via simple “isolation”

I’m enjoying music from my internet provider at home using HDMI from my cable box to Oppo 205. Found an old original MIT Z Isolater while tidying up on a frigid (-8 degree celcius) day here in Vancouver,BC. Idle hands are the devils workshop? Decided to try it on the Actiontec ECB6200 my cable provider supplied. I am “very” pleased with the enhanced audio through my Spectral Audio/MIT Cables/B&W system. Picture quality on my ~5 yr old “Pany” may be a touch brighter/clearer as well. Does this make sense? Have any others who listen from their internet provider tried AC isolation/conditioning on the unit provided? Cheers to more refined replay :)