?? is about ohms and i guess, bi-amping??

if i remove the bridge on my speakers how does that change the ohms??? i have a pair of martin logan sequel II's and was kicking around the idea of (i guess) bi-amping, removing the bridge thing on the speaker's and using one stereo amp a speaker so instead of left-right outs theyed be hi-low and get another matched amp so the amps would be left-right.... is that bi-amping???
1. It is not likely that the impedance will change.
2. That's biamping.
3. Why would you want to bother?