I love these threads and how they twist and turn, altering the "purity" of the OP questions.
It's like asking two different people how a piece of electronic gear works:
A typical guy off the street would reply "Push this on-off button".
An electrical engineer would be frozen in place by the complexity of the question.
My Klipschorns have sounded great with a CJ tube amp & preamp, CJ preamp and modified Hafer SS amp, and now wirh a PL integrated tube amp.
( my only concern with the PL integrated is how at listening levels the volume knob is barely cracked open.)