@Ras777 , before you do anything, please explore the amp assign menu and if you have the speakers, try connecting them to make sure it works. If it does, and now I believe it most likely will, then I owe you guys an apology as it would mean that I understood the manual and the other forum posts incorrectly. The manual is confusing too, there is no doubt about that because it seemed to show that for 11.1, you have to connect a 2 channel external amp to the pre-outs for the height channels only. They actually showed several examples of 11.1 but none indicated the use of pre-outs for the FL and FR. However, if you go to the set up menu, select amp assign, select 11.1ch, you will see that for each of the height layout, you have the option to select pre-outs for the "Front", or one of the different set of "Height/or Top" channels, to complete a total of 11 channels.
So again, I apologize for inadvertently spreading false information based on my previous understanding, or unfortunately, misunderstanding..
I hope I understand it correctly this time, but please try it.