Ahh, I understand.

So basically, in order to do what you want to do with that amplifier, you have to use unbalanced connections for the fronts and split the output from the pre-pro using some sort of Y splitter?

Whereas in your perfect world, you'd like to be able to use the balanced connection to connect the pre-pro to the amp and the unbalanced to connect from the pre-pro to the speaker's amp?

And since the pre-pro will only send signal to balanced or unbalanced and not both at once, you can't do what you want?

I think I understand now. Thanks.