Drivers in series or in parallel: is the crossover point affected & what else?

In response to the thread initiated by Hooman R on my previous video. Thank you Eduard and Hugo for the superb discussion, here's my contribution to the train of thought.
Links:
Vcap crossover calculator:
https://www.v-cap.com/speaker-crossov...

Stereophile link to the amplifier measurements of the output tap performance quality:
https://www.stereophile.com/content/c...



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