I agree with the other posts that you want
your bass sound hitting the PA, but my experience onstage with that particular pedal would lead me to say "DI before".
When I used it in my chain, my bass would just get swallowed in the mix whenever I kicked it on. And frankly, I don't trust most sound guys to handle an fx-laden bass tone.
Ultimately my solution was to arrange my fx chain so I have a wet/dry blend for using effects. I use a Boss LS-2 right now. There's tons of others.
But I can run a mix (that I control) of wet and dry signal to my amp and or sound system. I DI the at amp, and keep both the tone I want and the control of wet vs dry.
And, frankly, I don't trust most sound guys to know what to do with a hard-to-dynamically-manage effect like an envelope filter....
