08-23-11: JohnkIn a bi-wire arrangement the current and the power corresponding to the high frequency and low frequency spectral components of the signal do indeed travel on the cable run that is picked for them, although the voltage waveform that propagates through both runs will be essentially the same.
You have the same signal on both runs of biwire. The treble and bass do not just travel on the cable run you pick for them unless actively filtered.
The high pass section of the speaker's crossover will block (or at least greatly reduce) the low frequency currents that would otherwise flow through the wires connected to its terminals. Likewise, the low pass section of the speaker's crossover will block (or at least greatly reduce) the high frequency currents that would otherwise flow through the wires connected to its terminals.
Your comment would be applicable if the jumpers were left in place while bi-wire cables were being used.
Regards,
-- Al