To save some time, i think his point is that the amp will only provide the maximum current available, no matter how many paths you provide for that power. Unless you have independent power supplies passive bi-amping is really just bi-wiring. For example, I bi-amp in my car, where the cross-over gets a signal for the tweeter from a good moderate power amp, and the mid-bass gets a signal from a more powerful amp. That is true bi-amping (as I understand it).
To be clear, I'm not implying you didn't' know this, just figured many readers are on different places on the learning curve. (Be damn funny if my example was wrong!)
See my above reply.
