Mike,
Read the description of the amp. If you want it to be a 3 or 5 channel amp, you just hook up 3 or 5 of the channels and it distributes the power accordingly. In 3 channel mode, it effectively is a 500 Watt per channel, all channels driven class D amp. Also, unlike monoblocks, if 2 of the channels are using 200 Watts each, it can still deliver up to 1000 Watts to the remaining channel(s).
It is out of my price range, but I am interested to read the AH review.