Cables or active components, I always 'compare' the sound I get from the speakers with what I heard live, as I remember it. I have a few recordings of the musicians that I heard live, some of them without microphones. So I always know, if I remember right, where the system is going.
By the way, microphones do not 'hear' everything there is to hear, only ear can do it. Might come close but not really there.
By the way, microphones do not 'hear' everything there is to hear, only ear can do it. Might come close but not really there.