Erik, I'll agree with Ken's analysis and add a couple points. Supposedly buy-wiring creates some separation of the high and low frequency signals which wouldn't otherwise exist and the big bad low frequency signals don't beat up the "delicate" high frequency signals. This is all nonsense and no audibly meaningful extra separation has been created. Any speaker with separate high and low frequency drivers has to have the signals to the drivers separated in the crossover circuitry. Even when a speaker has a single set of terminals, the wiring splits inside the enclosure to feed full-range signals for processing in the separate high and low frequency sections of the crossover. When buy-wiring(aka bi-wiring)is employed this splitting is simply moved back from inside the enclosure before the crossover to the exit point from the receiver output terminals. This has no significant electrical effect.
