Am a new 990 owner and have spent the day going over the manual (7500 hasn't arrive yet). My current Denon receiver has "B" speaker capability and I have them going to a Russound splitter which feeds speakers in the kitchen and on the deck. They each pass though wall mounted volumn controls by Russound. My question is how can I get the second zone of the 990 to feed these speakers? Do I have to buy another amplifier hooked to zone 2, or are there other options? If yes, what hardware choices are there (preferably with 12v trigger) and not costly?