Hey @dean,
Whilst we guessed the new filter options might get used in a pinch for this kind of thing, the SQ is not intended to take the place of a speaker processor.
If you don’t have built-in crossovers as in many active systems, then a dedicated processor would definitely be your best option.
The thinking being that the speaker system should be set and fixed before an event, and should never need adjustment during the show. All the processing power of the mixer can therefore be put to use mixing the channels and processing the mixes.
Really, the speaker processing ‘belongs to’ the speaker system, in the same way as amplifiers do, so ideally you can rock up to any speaker system with your mix and it should be close.
Regarding the routing of mixes to matrices, there are no routing points in the core architecture for this in the way that there are for input channels, as a matrix in the SQ is a mix of mixes (and post all).
You can see this in the system block diagram here – (https://www.allen-heath.com/media/SQ-5-Technical-Datasheet_F.pdf#page=5&zoom=200,-60,623 – I’ve linked to the SQ-5 version, but all models have an identical core).
Hope this explains it!
Cheers,
Keith.
