Nsgarch - I appreciate you taking the time to actually look up the amplifiers and getting to the bottom of the story.
I made the assumption that a monoblock amplifier would be intended to only run a single channel and the use of a rear channel set of speakers would be better using a second amplifier. The ability of the amplifier to run two sets of speakers in an A/B configuration would be perfect for people with two sets of main speakers, but it didn't occur to me that anyone would want to run identical signals to both front and rear speakers.
Wouldn't using a pair of these amplifiers to drive a pair of front and rear speakers be the equilavent of putting a surround receiver on the "all channels stereo" setting? It's can be nice for room filling sound but is certainly not for critical listening.
Your additional research gave the OP more information to work with and that's always a benefit.
