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He says he has just come from that side of the river. Can he have taken the wrong road? The old man cocks an eyebrow and says, "The road is not wrong, it is the traveller who is wrong." -- Soul Mountain, by Nobel Prize Laureate Gao Xingjian
Reducing magnetic interaction is the primary reason speaker biwiring helps so much. Biwireable speakers have separate inputs for the bass and upper frequency ranges. These speakers simply allow separate access to the two halves of the "crossover". A crossover is simply a low-pass filter which allows low frequency energy to pass to the woofer, and a high-pass filter which allows higher frequency current to pass to the tweeter, or midrange and tweeter. These filters block the undesired signal by causing the amplifier to "see" an essentially infinite impedance (resistance) at the frequencies which are to be blocked. Because there is no closed circuit at the blocked frequencies, current at these frequencies does not travel in the cable-just like a light bulb which does not light when the electric switch is turned off, no matter how many megawatts are available.