I know this much, the meatbox can blow your speakers without you thinking it will the way you have it set. IME so far, it seems as though once you start getting around 1 oclock on the output, with the bass and sub anywhere near 3 oclock and past, youre pushing it pretty hard. Doesnt matter where the octave is.
I got one of those tip/sleeve patches that I was hoping to try at some point at a show by running it straight into a mini DI on my board then have the FOH hook that and my main signal up. That way I can bump as much as I want and not have to worry about damaging anything. I also should have a Behringer limiter coming back my way as well. I was planning on using that when I didnt have a PA to go into.