Gain settings for Mixer

Archived from groups: rec.audio.pro (More info?)

I would like some advice on setting gains. I have a Q-3433/MKII mixer.
To set gains, should I aim for the LED's to average around 0 or +4?

At what point will this mixer start clipping? My intention is to play
prerecorded soundtracks, should I set the gains to match the loudest
peak instead of the average? If so, what is the loudest peak I should
allow (ie, +4, +7, +10)?

I doubt they are pertinent, but here are the system specifications just
in case. The input will be a CD Player. Output is via XLR to two
Mackie SA-1532z (1300w/ea, 3 way, with two 15" woofers). Venue is
outdoors open field.

The mixers manual is available at:
http://www.americanaudio.us/manual.asp

Thanks,
Daniel Clark