Subs

Mmmm subs
Ok, we have been messing with the subwoofers for the past few months, some of the issues we were trying to deal with were, low feedback from pastors mic, muddy vocal sounds, lack of thump from bass guitar and drums. I believe we have settled on a solution for now that seems to work well.
Mix
What we have done is place the subs on their own post fader mix, simular to a mix used for reverb. This gives us complete control over what gets into the subs and what doesn't. Leaving the aux set to post fader allows you to control the level of both the mid/high speakers and the sub with the channel fader. What goes in a sub? Kick drum and bass guitar, keyboards for sure, the rest is optional. The accoustics in the gym do not tolerate long sustained bass, since clairity is already poor it is best to limit what goes into the subs.
Setup
For the aux subs we are using a separate crossover and EQ, the DBX digital system controls the upper mid/high speakers. The original setup still exists and can be used if you don't see a need for seperate control over the subs, an example would be if we were showing a movie.
The signal chain is as follows;
Input Channel - Mix 10 - Peavey EQ - Samson crossover - snake send - left side of QSC amp -mono send to subs
Operation
This is my own personal way of setting up mixes.YMMV
Get the stage, monitors and band happy with their mix.
Check through all gains for clipping and low signals, noise from DI's
Adjust mic and monitor placement.
Listen
Get the band to turn down what is too loud....
Add vocals and EQ
Add guitar and keyboards and EQ
Add extras (brass,flute,chello)
Add drums and bass
Get out and walk around the room, adjust speaker placement as necessary.
Learn each song, what needs to be turned up or down.
Enjoy

Keith

Link for detailed info on aux subs