I believe that you would still only have the 165 but I will let the experts respond on that end. I am curious...which speakers do you have? I have the Polk LSIs which are also 4 Ohms and I found them to work better with the 770.( I used to have the 7100) They just seemed to open up more with the extra power and now I have more headroom for those volatile movie soundtracks.
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