I'm trying to understand it as well John, maybe Alan will jump in. The way I understood it is that the 600 requires more of the signal produced by the receiver, which would leave less for the other subs. I suppose I should have asked more questions.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85