Correct me if Im wrong but your talking about a two channel amp. When you start putting 7 amps in one box you are still limited to the 15 amp outlet on the wall. I believe if you look at even the high end multi channel amps they won't double the wattage when the load is halved. Some I have seen rate the wattage the same at 4 ohms. I belive most mfgrs. if honest would give you a rating based on a transient using energy stored in the capacitors. As far as Sunfire is concerned they use a entirely diffrent approach. Where most amps are running at full idle Carver uses a tracking down converter which allows the amp to keep the idle just above the input signal. which consumes much less power and requires minimal heat sinks. But the Sunfire amps are not as clean as conventional designs. Come to think of it if you have electric heat you could disconnect the line from it and connect it to your 770 and let this puppy heat your home theater.