I have a nice integrated amp, previously had separates. I plug all into an AQ Niagara 5000 which has a current bank so it doesn’t limit, but actually can improve dynamics.
After plugging things in, I noticed an immediate and significant reduction in the so called “noise floor”. My audition was 30 seconds before I decided I would purchase the unit. Mind you, this was after having several other units in on audition from which I heard no benefit whatsoeer.
So, a home audition is mandatory. Not all “conditioners” are created equal. I not only have strong surge protection for expensive gear, but the unit absolutely made things better.
As in all things, YMMV.
Best,