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

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

Thanks gentlemen!
Luis

Greg,
Don't mention. I appreciate your input.

Let's take the discussion a step further. If I were to split the signal at the amp, and rather than use 2 of the channels on my Krell, use one and run the other side of the split to a tube amp, what type of things would I need to understand in terms of power, crossover, etc., to appropriately match a tube amp to the mid/high connections, and my Krell to the woofer?