I've tried to read through threads here about what the difference is between using the BD21 in DI mode vs pre-amp mode, and I'm still confused, people use terms like "mic level" vs "instrument levels" that mean little to me. First off, the only reason I am looking at the BD21 is that I want a cheap solution to plug into the PA (Board?) when jamming with some friends and still sounds decent.. I wouldn't have to drag my amp to work on my way to the friend's house after work, etc... I'm not worried about recording, etc... I can do that through my Eleven Rack, but I don't want to drag it with me either. After the reading I did, I *think* that in DI mode the bheringer simply passes my bass signal directly to the board/PA (over XLR). I think of it as a jack to XLR converter with a ground lift if needed. In pre-amp mode, the pedal will act similarly to the frontend of an amp and let me color the bass tone through the different knobs, on the interface, however it will still be able to be plugged into the PA/Board. That would be the prefereed mode becaue otherwise the PA may be too flat to let the bass sound good?