I have been using a 950 since 2002 and I just replace it with the 990. I changed over to Outlaw XLR cables and have only had a day or so to play with it. I am having some trouble getting it setup so that my wife won't have any trouble using it. I am trying the Zone 2 method, but I must be doing something wrong, cause it isn't simple. I think everything is set OK in the 990, it just getting the MX800 setup right. One thing I don't understand fully is the 12v trigger. When on it triggers the 12v when something starts using that source, but if you leave that source to go to another that has the trigger off it will tigger the 12v again. Is that how it is suppose to work??? This means that if you switch to any source that does not have the trigger enabled it will turn off all your amps or what ever you had turned on via the 12v trigger.