I just got this back from another friend in the biz
Except the way I read the manual, the speaker is configured to handle pro/consumer level output gear. What he said makes sense though, but it doesn't seem to jive with the specs. Who knows, its worth a shot. The manual may just be crap.
I do agree with him that if you really like doing this, you need to start looking into getting a pro level mixer. Running everything XLR just solves so many headaches like this.