Sdatch, I've owned two speakers over the years that were bi-wireable: Vandertseen 2Cs and Celestion SL-700s. In the case of both of these speakers, each sounded much better bi-wired than single-wired with a good quality jumper cable. Designers, and our friend Redkiwi, clearly differ on whether bi-wiring is a good approach. But, in the case of these two speakers, using the bi-wire capability did allow for improved sonics in my system at the time.
There is a discussion of the
"advantages" of bi-wiring on the Vandersteen web site that will tell you more about this than I could ever pretend to explain.
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