Can someone please explain


What you mean when you say (whether it’s a speaker or amp or preamp) it’s darker or warmer or softer or leans to the brighter side of neutral? Are you talking about how ss compares to tubes to class D? Analog to digital? How do you know what "neutral" is? How do you not know it’s actually in the recording? 
Curious minds/ears want to know.
rsf507
well, ears are like mussels need to be introduced to physical activity, developed and trained:))), but some capabilities are congenital 
@millercarbon 
some mussels definitely are, but their function is not always congenital... the Musculus Cremaster is good example :)))