i can't think of many genuine reasons why somebody [i]wouldn't[/i] want tone control options on their bass? I currently only own 1 passive bass, and i miss actives sorely. Out of interest, do you passive bassists run your amps eq flat as well? If not, then i ask what is the difference between altering eq on the amp and on the bass, apart from the obvious conveniance of being able to change your eq on the fly?