Good point Drubin...in reality every piece of the chain is important to an optimal result.
The way I interpreted Chungted point, which was the basis for my response, was given an existing system (without regard for how it was put together) one is best advised to optimize from the source back to the speakers. Why? Because so many audiophiles switch out speakers, or cables or amps, or pre-amps, in search of better sound, when in fact, it is their source that is the weaker link in the chain.
Anyway, to each their own, there are lots of ways to nirvana in this hobby/obsession.