“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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practikl wrote:  “And after getting a black background you just found out that your new noise floor is your tinnitus...”

I literally laughed out loud as this has been my experience!  I frequently work in an environment that has multiple (40ish) video recorders in a huge racks that all have fans going within them.  Then there’s the noise generated by the robust heating and (mostly) cooling systems.  Toss in a TV and you’ve got the perfect recipe for tinnitus, which I have!