Rleff -- Interesting thought, but I wouldn't think so. From the amp's perspective, the speaker load impedance should appear to be the same in both cases, with the VERY slight exceptions that:
-- The total wire resistance and inductance, being greater in the non-biwired configuration, would cause the amp to see a VERY slightly heavier load in the biwired configuration.
-- The amp would see a VERY slightly greater amount of load capacitance in the biwired configuration.
-- The amp would have to deal with a VERY slightly greater amount of back-emf from the woofer section in the biwired configuration, because a VERY slightly greater fraction of it would be absorbed by the high frequency section of the speaker in the non-biwired configuration.
But I would think that all of those differences would be extremely minute, probably not audible at all, and certainly not enough to account for what Cepages seems to be describing. And having the amp deal with woofer back-emf, rather than the mid/tweeter parts of the speaker, normally improves rather than degrades the sound.
In saying these things I'm assuming, of course, that the wires do not have extreme, outlandish values of either resistance, inductance, or capacitance.
Greg said:
he told me that when you bi wire the current of your amp gets divided between the two wires and that only half the current would get to the woofers and half to the highs
He mis-stated that to you. What happens when you biwire is that the low frequency part of the crossover network in the speaker, being in series with the low frequency wires between the speaker and amp, keeps the high frequencies from going through the low frequency wires. And the high frequency part of the crossover network in the speaker, being in series with the high frequency wires between the speaker and amp, keeps the low frequencies from going through the high frequency wires. The result is less interaction between high frequency and low frequency currents, which normally results in a slight benefit. Also, as I noted above, back-emf from the woofer is conducted entirely to the amplifier, rather than some fraction of it being conducted to the mid/high speaker elements.
It's easy to understand how bi-wiring can result in either slight improvement or no improvement, but frankly I have no idea how it could result in significantly worse sound (assuming, again, that the cables have reasonably conventional parameters).
Regards,
-- Al