A good power conditionner with tube amps ?

I get good results with a $200 Monster Power strip I've used for several years. Its an inexpensive option to try that makes a clear difference that can be heard. I have finicky ears when it comes to clean sound and I haven;t convinced myself I need anything more at this point.

"Not just my experience, read the threads, this has been gone over many times before. IMO, power conditioners are for everything BUT the amplifier."

This is not intuitive to me.

How or why does it negatively affect the amplifier's sound?

I took my power amp off my power strip yesterday as an experiment.

I did not hear any improvement or really even a clearly noticeable difference.

Interestingly, my Musical Fidelity A3CR continued playing without distortion a good 10 seconds or more after I unplugged it, which was pretty interesting.

Made me think that maybe some amps are designed to buffer power and decouple from the power supply as much as possible which might reduce the benefit of conditioning perhaps.

BTW,

Benefits of power conditioning with power amps may be debatable or even non-existent, but the benefits clearly exists with other low power level components IMHO.