+1 hilde45
The video comparison with "black background" rings true. Same principle applies in framing pictures. Or plant a rose garden in an empty lot -- you may think it looks fine until you surround it with a hedge of dark yews. Now you see what you've been missing, with sharper resolution of both form and color. Similarly, lower the noise floor in an audio system and your resolution improves.
Not saying any particular change will be noticeable in OP's system. Just that the principle is valid as applied to hearing as well as seeing (and to other sensory appreciation too, well beyond the scope of OP's question).
Why do I need power management if I have a great power cord?
Isn't it kind of unnecessary to additionally add a power conditioner if I have an expensive audio file grade Power cord connected to a component?
So you buy a Power conditioner from a hi-fi store and they say oh, you need a really good power cord to go with that and then another one to go from conditioner to the component. Do you need it all and why? Seems the last couple of feet before the component should be more than enough.