Well after doing a bit of research and whatnot ill hand it to you that I thought that the receiver would separate the workload in an active crossover when bi-amping but it seems it just doubles the draw on the power-supply by sending the same signal, so I learned something it seems thanks to you lot. cheers
Just to be clearer and more accurate, the preamp sends the same signal to the power amp bi-amp or not. So the power amp has to amplify the same signal in terms of
voltage, but it will not send the same signal in terms of
current to the speaker terminals as such.
In fact, one amplifier will send the higher frequency signal to one set of speaker terminals and the other amp will send the lower frequency signal to the other set of speaker terminals. The frequency range split will depend on the crossover characteristics of the speaker.