I have a 5 channel setup which includes Studio 100's, Studio ADP and Studio CC. Since I'm only using 5 of the 7 amps on the 770, what should I bi-amp? I mainly listen to 5.1 sources, so should I bi-amp the Studio CC and have 1 unused amp? Or should I bi-amp the Studio 100's?

What is the difference between vertical and horizontal bi-amping?

Thank you!