Bi-wiring usually lets more cable reach your drivers...whether that's necessarily always a good thing depends on your speakers? I have found when I bi-wire with 2 sets of the exact same cable there tends to be overall improvement and what I like is using 2 different cables for each driver and in so doing I can tailor each cable "synergistically" with each (much like power cords or different I/C's in your system). My Silverline Sonata 2's were bi-wired as such, much to their benefit. My 2 cents.. (again).