I have a Sterling by Music Man Ray34 Active Electric Bass. I'm playing a show with my high school jazz band in an hour. I was getting everything ready and wanted to make sure my spare battery work. I took the battery I was currently using out and through in the new backup, and lost a ton of sound. I firgured that was just a bad battery so I throw the one I was using before back in and that ones not working either. So I'm pretty sure the "active" part of the bass isn't working. Not sure how I broke it. I don't have time to take it to a shop to get fixed. Is there something dumb I'm just doing? Or is there something easy I can fix? Should I just use a pedal to try to bring the sound up? I'm really scared 
