[QUOTE=bemcsa]the dealer said that it separates harmonics travelling along the cable at different frequencies[/QUOTE] That was/is the standard justification but IMO this is utter rubbish. Both cables will carry the full frequency range signal; you don't have seperate low and high frequency signal until after the crossover. Bi-wiring may IMHO make a difference due to other reasons, but [i]not[/i] by this proposed effect. Now if you were to stick the crossover near the amp and then have long wires running from there to the speakers then you actually [i]would[/i] be seperating the signals, and so could perhaps optimise cable choice for each seperately. Like Michael, I'm lucky enough to have speakers from a company which doesn't bother with more than a single pair of speaker terminals :).