Matthew: It probably does attempt to suck this power out of the wall. However, they also state that "Power consumption: 1,800 watts (maximum)". So, based on this, there's no way for it to produce 2100 watts (300x7). However, there's also little or no way for someone to ever draw that much power unless they have a set of inefficient, low impedance speakers and like to listen really loud.

I have a Creek 30 watt/channel amp that goes as loud as I care to go for two-channel, for both my Mirage (8 ohm) and Linn (4 ohm) speakers. 300 watts would be obscenely loud.

I just don't think that a company should be able to state, on the one hand, that maximum power is limited to 1800 watts, and yet, on the other hand, that the amp has a power output of 300 watts x 7 channels (2100 watts with 100% efficiency). There should be some type of disclaimer. Perhaps if you order the 220V version, you can get it to actually produce 300Wx7?