The filters in most power conditioners can result in "current-starving" of amps which is why many manufacturers recommend plugging their amps directly into the wall outlet. Source components are less demanding current-wise and may benefit from a conditioner. A Furman AC-215A provides surge suppression and line filtering for my FM tuner and CD player.
Who Tried Power Conditioners Over The Years and No Longer Use Them Today, Any Why?
Been thinking back to when I started in Audio and how good the system sounded with no power conditioners or fancy power cords. Then in the '90s slowly they both became a huge profit market for stores and manufacturers of them. If you used one on front end gear only or whole systems I will be interested in your real-world experience you could share with us all. I have a few so I am not against them, but I do at times have questions.