Apologies if this is a bit of a hijack, but I've never really understood biamping/biwiring. Both sets of signals in both cases still need to go to the crossover since they both contain all frequencies so I don't see the advantage. Sure two wires have a larger x-sec area, and in biamping you've got more power but bigger cables and a bigger amp does the same thing without the complexity, clutter and, in the case of biamping, a risk that the timing of the two amps is slightly different.
My education continues.....