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Stupid question. Why would you biwire your speaks?


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I think some beleive that since the independent crossover parts are separating the drivers (although all connected to the same amp outputs as parallel circuits) that there might be a difference in how the drivers and amp interact... for example back emf from the driver to the amp is different for the different drivers (although all the driver paths to the amp are parallel and therefore connected)... some actually use different cables to facilitate any difference (big fat ones for the low end and smaller ones for the high end).

In a way, it sort of makes a little logical sense if one is thinking of electricity in terms of hydrodynamics (plumbing), but the speed involved with the electrical signals is so many orders of magnitude greater biwire is generally considered an ineffective tweak - any back emf (or anything else) will get to all the drivers through the common connection to the amp, albeit delayed a tiny bit, but the speed and distance make the delay so small it is not thought to have any effect. Which is interesting in light of how shorter feedback loops in amp topologies (where the delay is really short!) are thought to have a positive effect over longer feedback loop topologies.

It seems that for every tweak that is seemingly baseless in theory, there is a logically corresponding accepted engineering principal based on the same theory, so who knows... more incomprehensible things have happened 3799571116 and yet the world goes on...

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"Every foot of speaker wire adds a bit more resistance, capacitance and inductance to the performance equation. While these parameters by themselves have minor sonic effects, the total impedance of the wiring network has a larger effect - especially on the amplifier. The trick is to minimize the effects of the wiring, so here's a good rule of thumb:

For less than 50 feet to the speakers or volume control, 16AWG is fine

From 50 feet to 100 feet use 14AWG

For 100 feet or more use 12AWG

Don't forget to account for the expected bass response and volume at which the speakers will be played. For primary sound where dynamic range is at a premium and full range sound is desired, use more copper. For background sound you can drop copper. In other words, you are unlikely to compromise the performance of a pair of 5-inch coaxial in-ceiling speakers placed in the master bathroom by using 16AWG, even if the run is 100 feet. On the other hand you may want to use 12AWG if you're wiring your main theater speakers - even if the run is only 30 feet."

--Joseph D. Cornwall, in Audioholics "Whole House Wiring Basics"

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