As far as the weight, the 770 is not out of the ordinary. For example:

770, 90 lbs, 7 channels, 12.9 lbs/channel
755, 78 lbs, 5 channels, 15.6 lbs/channel
MA-500, 13.2 lbs, 1 channel, 13.2 lbs/channel

Not a whole lot of difference, just a lot of channels in one package.

Do not get me wrong I am not comparing the sonic attributes of these amps, just an observation on the weight issue, which seems to come up a lot.

[This message has been edited by morphsci (edited May 18, 2002).]