I was always told to start with the amps ac cable first. Since all components work through that anyway. The better your amp is set up, the easier it will be to notice the improvements (and to what extent) made to other components.
Without purchasing new components, speaker wire and amp ac cords are the most cost effective way of getting substantial results one way or the other.
Without purchasing new components, speaker wire and amp ac cords are the most cost effective way of getting substantial results one way or the other.