“Black background” — What really contributes to this phenomenon?

How to enjoy the tiniest of musical details and lowest noise floor against the blackest of backgrounds?  
Power? Sources? DAC? Amps? Cables? Tweaks?  Vibration control? Any of these in particular?

i never understood the "black background" bit- any well-reproduced audio lets you hear to "the bottom" as it were, a black background gives a language parser the impression that the instruments [as described by the listener] are heard as coming from an abyss with no audible studio acoustic or studio electronic noise along for the ride. it reminds me of people telling me that "phonograph recordings properly produced and reproduced, have a black background," when with my own ears i ALWAYS heard some noise in the background. 
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