Who Tried Power Conditioners Over The Years and No Longer Use Them Today, Any Why?

millercarbon

I disagree.

Better cables are ok, but expensive cables are just snake oils.

Phillyb is right.

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.

I bought a power conditioner decades ago. It made a not insignificant difference. 
 

in my new home, a dedicated line was run directly from the circuit breaker in the mechanical room to my audio room. I've found that the power conditioner still makes a difference but it's quite small. 

Shunyata Denali V2 made a big improvement to my system.  Everyting plugged in including amps.

Shunyata Talos made a good improvement. I want to go for Denali in the future. Recently I bought Audio Envy Mega 10 th gen. Power cable for the Talos. Simply amazing. The previous cable is the Shunyata  Cobra Ztron. No comparison at any aspect of high end audio.