well there's a 0, 3 and 6 db limiter. when i ran the gain all the way down at -19, and the limiter off, i was overloading like crazy. i was sitting about 6 feet from a main.
pop the limiter on -3 and it was more measured, but i can't tell for sure how that sounds, because i didn't keep track. i was just sort of fumbling around with it. next show i do will probably not be in a living room and i can try a more controlled experiment.
but my inclination is, no, it can't really handle high spls.