There is a Bi-amp function in my A/V Receiver.

Greetings all,
I just discovered that my Pioneer Elite Receiver has a biamp set-up feature using its own unused back channel speaker terminals. It still puts out a full range signal though, so the high and low taps on my speaks will still get the same signal. Is there any merit to doing this. Or could it be harmful to send a full range signal to the tweeter section of my Klipsch Epic CF3's. Or does the crossover still cut out any part of the signal that could be harmful.
Thanks,