Originally Posted by basshead81
so your saying using the avr power to drive the tweeter/mid and a seperate power amp to drive the woofers does nothing?
If there is an electronic crossover that sends the lows to the woofer amp and the mids/highs to the AVR power amp and there are no passive crossover components in the speaker then it's true bi-amping and it does work. If not, you're wasting an amp and wire.
For an example of true bi-amping you need not look any further than an x.1 AVR and powered sub. The electronic crossover in the AVR sends everything above the crossover frequency to the amps in the AVR for the mains and surrounds, and everything below the crossover frequency via the LFE output to the sub amp.
If the woofer xover is connected directly to one terminal, and the mid/tweet connected to the other, then you can directly drive the woofers with a more powerful amp.
You may do so, but it won't work much better, if at all, because you're still sending the low frequencies to the amps in the AVR. The benefits of bi-amping are only realized when each amp only works with those frequencies being reproduced by the speakers it's driving.