I'm curious about bi-amping a pair of vista's. The owner's manual says they are designed for this and someone at Martin Logan said they would do well. I have two solid state monoblocks I would run to the woofers, and a 2 channel hybrid tube amp I'd run to the upper part of the speakers. All amps have plenty of power. I would appreciate any feedback from those with knowledge or experience regarding passive bi-amping. Thank you, Jed