How many ceiling speakers did you add. Are you going 7.1.4 or ?
Things get really expensive when you start putting that much power into a single chassis. Many people get receivers that have pre outs for the height channels and pick up a modestly powered amp to run them, maybe an Emotiva of some sort. The heights are not used all that much and the power requirements will be nowhere near what you might think, especially compared to the mains. Sorry for the run on sentence i was on a roll LOL

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