Sorry I am late to the party with your solution. The following 'solution' is compliments of all the Bass players I've ever played with.
The solution - Make sure the bass is the loudest instrument on stage. I assume this translates well to the mixing enviornment. (Atleast according to Bass players) Also, don't be shy about giving yourself some chorus to really fill out the stereo field. Remember, when your Bass sounds awesome by itself, it will surely sound awesome in the mix!
Anyhow, problem solved, your welcome