Yes. I had a Monster ($600) conditioner . Surge suppressor fail and be informed they are unfixable (on my home theater). I wasn’t able to detect any better sound… unlike every other piece of audio power gear I have bought or used from Shunyata, Isotec, and Cinepro. these demonstrated marked improvements in sound.
I was concerned when I bought my first piece of Monster it was a marketing company with cheap internal construction that would probably provide no function… It has not… my surround processor got fried twice with this surge suppressor / conditioner in place. Why didn’t I listen to inner voice. I know better… what was I thinking.
I also tried interconnects… no better than OEM but cost lots more.