So back to audio...

What is the actual difference? Between going Active and just Bi Amping?
I get there's an external crossover. Can you adjust the crossover to your own liking? Or is it each set of particular drivers needs to be powered? In their own ranges?

Would using a lower power Amp. or Tube Amp. for the highs be advisable? Similar to Bi Amping.{Tweets use little power}

I've heard some darn impressive results from Active configurations bigger dynamics and body more open.

But aside from having hundreds too thousands of Watt's per speaker. What would really be the most beneficial reasons?