Please do not take my post as bi-amping is useless. Just a big difference bi-amping with a HT receiver and another older receiver vs. say some Aragon Palladiums or some Jeff Rowlands
SC
... while those on the other side of the fence of course argue that it is exactly the low cost amplifer, suffering badly under the strain of high power full range signals and inductive loads, that stands to gain significant performance increases from bi-amping. A truly high end amplifer shouldn't care.
One can make a "phase inverted" argument for high end speakers: if they benefit from bi-amping then their cossovers are not high end and then neither are the speakers (but I admit I added this mostly to provoke :-) ).
Jon