Bobby, there's no "biamping as in the picture" going on; there's only one amplifier shown there, with several channels of output transistors(which have no power of their own)to meter out the power from the one main power supply section to the connected speakers. The maximum power output(200 watts or whatever)that the amplifier is capable of isn't doubled or increased by any amount. Biamping requires separate amplifiers with external crossovers preceding them so that the amplifiers only have to amplify a limited frequency range.
Almost nobody goes through the expense and complication of true biamplification for home use, and there's no need to. Axiom, for example rates the sensitivity of their various speakers at around 90dB(quite loud)for 1 watt of input. 1 watt is all the power that's used for that sound level even if a 1000 watt amplifier is connected. Brief peaks on highly dynamic material, such as some classical recordings that I have, can use much more, of course, but the typical modern receiver with a rating somewhere in the 100 watt area is entirely satisfactory for nearly all home audio requirements. Relax.
