The output from any of the eight groups and the L&R Mix busses can be mixed into the Matrix A and Matrix B outputs using the Matrix section's rotary controls.

Here, groups 1-4 are used to create the mix to the Matrix outputs, feeding additional speaker stacks. Groups 3 & 4 are mixed at a slightly higher level than 1 & 2, giving more lead and backing vocals in the extra speakers relative to the basic band mix.

Groups 5 & 6 are used on their own for a feed to backstage speakers - this could consist of totally separate sources to the main mix, perhaps house mics and a talkback mic.