Bi-Amping with one amp?

Thanks guys. The question was mostly out of curiosity. Not sure if I will actually try this but it is good to know.

I have a Bryston 5 channel and have been itching to try this with some Vandersteen 3As. The speaker wiring is pretty clear. The source I am struggling with a visual. I assume the white would be split going to channel 1&2, the red split going to 3&4?

Thanks N80, but this is the speaker wiring. What I am referring to is the wiring from the dac or preamp. 

I had a pair of Nautilus 802's powered by a Pass Labs Aleph 5 60 watt stereo. I got another identical Aleph 5 for cheap. Nelson Pass tells me there's no way to use them as monoblocks. So I ran cable from right channel to the woofers and left channel to the mids and tweets. 2 separate cable runs. Same with the other speaker. Only drawback is the channel powering the woofs is doing 90% of the work. So I'd swap the channels once a month. This is called passive bi-amping as the crossovers are still splitting the signal. Active bi-amping is when you have an electronic crossover and it sends signals to dedicated amplifiers. This is almost never done in the home audio, but its done at every rock concert you've ever been to. Good for high sound pressure levels.