Correct me if I'm wrong on any of the following.
I only got about halfway through because of youtube's irritating ad interruptions but it seems most of the discussion seemed to be focused on the amplifier.
I have always been given to understand that the main benefit of biamping is not the amplification per se, but that biamping with active crossovers between the preamp and power amp(s) allows designers to do things that are essentially impossible with passive crossovers built into speakers- in particular, that crossover slopes can be much steeper than is practical with passives, better achieving the purpose of a crossover, which is to bandwidth-limit each driver to the range it can handle well. Since less amplifier power is wasted heating up resistors in crossover networks, power delivery would be more efficient too, although this may be less important / tangible because watts are cheap.
If this is true, the benefits of biamping won't really be obtained doing the crossover/driver bandwidth limiting between the amp and speakers as implied in the OP. The limitations of a passive network are all still there. The main benefit would be to whoever sold the amplifiers. In other words, biamping- assuming active line level crossovers- is more for the benefit of the speaker drivers than for the amp. Thoughts?
