Considering the years hi-fi manufacturers have been at it is it not strange that perfection has not been achieved! Rather like the soap powders where the latest product washes whiter than the one before. Amplifiers should perfectly reproduce the input signal at the output terminals and speakers likewise. But it is all about extra profit in reducing component count and cheapening manufacturing processes. A concert pianist I was reading about bought a modestly priced midi system for his needs. He quoted that no music system can match a live performance so there is no point in trying.