Boy, 37 more replies. There's nothing new about this and it's been discussed here at least ten times in the past few years. True biamping(questionable benefit for home use)requires two amplifiers, as the term implies. An amplifier basically is a power supply section connected to one or more channels of output transistors, which serve as valves to add the required amount of voltage gain(typically about 29db, about a 30-fold increase)from the power supply. The receivers which have a supposed "biamping" feature(among them most or all of the present Denons), apparently as an advertising gimmick, have only one amplifier(one power supply feeding up to seven output channels)and can't "biamplify".
Again, the amplifier always has to feed from its power supply to both the high and low frequency sections of a speaker. Funneling the same power to the speaker through two channels of output transistors(one previously unused)rather than one can't double the available power or increase it to any other degree.
