I use a stereo mixer that feeds:
the Laptop(in stereo),
my mic/harmonizer(in stereo),
the drums from the kb(in stereo),
and a wireless mc mic
into the stereo audio inputs of the kn7k.
This produces a stereo mix in my face that's pretty darn loud in small situations.
I then feed a mono send to the input of the Bose and the summed signal is amplified for all to hear.

Stereo is like a flash on a camera - it only works in a limited area. As much as I love the fullness - I'll repeat:
The audience rarely benefits from it.
As long as I keep getting these rave reviews on the PAS, I'm going to have to take them seriously.