last ones!

To recap the hook-up:
The Bose mixer feeds INTO the Yamaha aux in on the back of the instrument.
Channels 1, 2, &3 all feed into the s-950 internal speakers.
[ch1 - Wireless guest mics(2)]
[ch2 - guitar]
[ch3 - iPad]

Channel 4 is the Yamaha s-950 with the volume all the way down, and the main output muted. (VERY IMPORTANT)
That same channel feeds an "aux" out from the T-1 that feeds the Bose Compact, so the entire mix from the Yamaha goes into the Compact with EQ and level controlled from the T1 under my kb.

In order to use this method - your mixer MUST HAVE a separate, dedicated monitor send that works independently from the main send. In essence, It's like using TWO mixers.