It amazes me to hear all these different opinions here, some of them based on the equipment they have bought.
Something I learned a couple of decades back was to make sure your power was as clean as possible to your equipment in the first place. What I always suggest to everyone regardless of their equipment or what they want to spend on a power conditioner (or two...) is that they look after their power coming into their equipment first. Make sure you have dedicated lines to your equipment and that this power is not shared with the rest of your home. Only after this is done can you start comparing ’line conditioners’.
To be fair and to note, I have a couple of upper-end Chang Lightspeeds that I still power my preamp and non-power hungry components into. But any power delivery component such as an amp or subs are plugged directly into the wall.
To this day, and in 3 different homes, this has been by far the best configuration. (all direct comparisons because none of these homes had dedicated power panels to a music room to begin with)