I just bought a yamaha rx3020 and I have klipshe speakers. The receiver is rated at 150 w per channel and the speakers are rated 125 w. I was wondering since it is an 11 channel amp and im only working with a 5.1 surround if i can bi amp the towers to a seperate channel on the reciever with out running a chance of blowing the speakers. It makes sense to me that I would be pushing 150 watts to the high and low each instead of the entire speaker. Thanks I'd really appreciate any advice.
It is unlikely you will hear any difference between the bi-amping case and the case of using only one amplifier channel for each. That's especially true with Klipsch speakers, which tend to be pretty efficient and have benign loads. On the other hand, it will do absolutely no harm to bi-amp them. You see this question come up a lot on this forum - "I've got extra amplifier channels that will go unused, so why not bi-amp?" And the answer is, if that's what you want to do there is no reason not to bi-amp.
Your concern about exceeding the power rating of the speaker is unfounded. There's probably no more or less chance of blowing the speaker with bi-amping. You stand more chance of hurting a typical speaker by under-powering it than by over-powering it.
In theory, but only in theory, there is an advantage to putting twice the power supply and twice the output stage capability into powering the speakers. You might get lower distortion, you might get better output stage stability, you might even get a peak output advantage (but I doubt it with Klipsch speakers), it's just that all of these potential advantages are so small that you're likely to hear them only very in exceptional cases. You probably don't have one of those cases.
But passive bi-amping will do no harm at all, except perhaps spawn a whole bunch of posts telling you how silly you are for doing it.
