Can you add an external amp to the 1910? I couldn't find any preouts for an ext. amp on the pics of it. Maybe I'm overlooking it?

I want to upgrade my HK247 to one of the newer denon's since my receiver won't utilize my back speakers when playing a movie in 7.1 on my Blu-Ray discs.

2 = M60,4 = QS8's,1 = VP150,1 = EP350,1 = EP500
HK247
Optoma HD70,110" DIY screen
Xbox360 & PS3