Cross-talk and distortion, chief soundstage contributors...

In my continuing effort to learn about the "chemistry" of sound, I have recently been informed that it is significantly low (vanishing) distortion and avoiding crosstalk that supply the key sonic elements for deep, broad, tall, etc. soundstage... this, of course, is independent of speakers, pre-amp, cables, etc. I'm focusing on the amplifier, alone... Again, the issue here are the fundamental (amplifier) qualities involved in soundstage. Can anyone add some dimension to what I'm learning in this...

Thanks in advance,