I just got my new bass back, and yeah I can't get a sound out of it It's not the lead or the amp (unless you need a different amp?) cos they're fine with my other bass. so I was wondering if active basses need different amps? I remeber seeing different inputs on an amp once.. but an amp with only one input.. will an active bass not play properly through this kinda amp? Or could it be the battery? I got this bass secondhand so yeah, I don't know how old the battery is. But how would you be able to tell if the battery needed replacing?