Is it best to use a 5-channel amp for biamping??

thanks sean and greg, I've been trying to understand this for sometime, and your explanations have finally made it make sense to me. Sounds to me like I will hold off on bi-amping until I'm ready to add a crossover between the processor and amp. one final question, if I am running N802's, which like high levels of power, would I hear sonic difference running two channels off my amp into each speaker, effectively doubling the power they're receiving? I realize it probably won't be as significant as actively filtering the corssover before the amp, but would it be pronounced given that my speaker respond better to increased power? (my amp is a Krell TAS 200x5)

Greg,
Thanks for the clarification! I am well versed on crossover /band-pass filters circuitry. I just wasn't clear on the way you used "sonic signature" in this context.

I think I will go for the 5-channel cinema grand, instead of the regular two channel Sunfire.

Thanks again.

I would like to read the response to Arthur's statement regarding the improvement with more power, would like to add a little twist to it.... if your 5 channel amp is struggling to handle the speakers (using one channel per side), so using 2 channels of the 5 for each side (L & R) wouldn't it be expected to have a more noticeable effect (common sense suggest dynamics) with this scenario? Thanks
Luis

Increasing power typically results in a more consistent presentation regardless of volume. This translates to maintaining a more cohesive and liquid presentation as spl's are increased rather than the grain, glare and distorton that we experienced when pushing the system with the smaller amp. By removing all of the negative attributes brought about by the limited headroom of the smaller amp, one can listen at higher levels with less fatigue for longer periods of time. That's because you aren't hurting your ears as much due to a reduction in multiple types of distortons. All of this with increased coherency. Then again, going to a bigger amp that lacks proper design and uses lower grade parts may actually sound worse than a lower powered amp that was well built and designed. Quality first, then quantity. Sean
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Arthur- IMO using 4 of the Krell's channels should make a difference. I'm assuming the B&W's bass & mid-hi x-overs are discrete (not connected) of course. You should have better control and response in the low frequencies.
Planckscale- sorry for regurgitating what was obvious to you!
Cheers