There's a very sound reason why bi-wiring works.
Remember that your crossover is basically a filter that splits the signal inside your speaker and sends the highs to the tweeter and the lows to the woofer. Up until that point, all frequencies travel together along the single speaker cable.
By removing the jumpers and using bi-wired cables, the high and low pass filters become part of each loop right back to your amp terminals, meaning that the high frequencies can't travel along the woofer cables and vice versa. This helps to reduce distortion and smearing of the sound. It's very similar to the way S-video cables separate the luminance and chrominance signals to improve picture quality over composite cables.
But as Shadorne said, if your speakers/system isn't truly suited to bi-wiring, you may hear little or no difference.
At the very least, you've doubled your wire gauge!
Remember that your crossover is basically a filter that splits the signal inside your speaker and sends the highs to the tweeter and the lows to the woofer. Up until that point, all frequencies travel together along the single speaker cable.
By removing the jumpers and using bi-wired cables, the high and low pass filters become part of each loop right back to your amp terminals, meaning that the high frequencies can't travel along the woofer cables and vice versa. This helps to reduce distortion and smearing of the sound. It's very similar to the way S-video cables separate the luminance and chrominance signals to improve picture quality over composite cables.
But as Shadorne said, if your speakers/system isn't truly suited to bi-wiring, you may hear little or no difference.
At the very least, you've doubled your wire gauge!