I went through this bridged/biamping decision within the last few months. I had started by bridging my two Rotel 980BX's into a pair of Totem Rokk's. Obviously I didn't need the power for these speakers, but I wanted to see what difference shortening the speaker leads would make. I started with an old shotgun set of 10' XLO cables and clipped them down until I had about 4, 18" leads. I could distinctly hear an improvement in the details of the music.
Not long ago I swapped out the Rokk's for a pair of Aerial 10t's. These do need the power, but more importantly, they need the current. So after a few hours of listening at modest volume levels, I switched back to stereo mode and horizontally biamped which required using the other 7' of the XLO's. The details were still there, the bass improved, and I can turn up the volume more without the fear of clipping and damaging the 10t, which are worth far more than the amps.
Not long ago I swapped out the Rokk's for a pair of Aerial 10t's. These do need the power, but more importantly, they need the current. So after a few hours of listening at modest volume levels, I switched back to stereo mode and horizontally biamped which required using the other 7' of the XLO's. The details were still there, the bass improved, and I can turn up the volume more without the fear of clipping and damaging the 10t, which are worth far more than the amps.