Alright, so I got my yorkie 800 watt head, and it's runing into my dr. bass 1260 cab, and it sounds fantastic, but there's a minor problem. Whenever I get into the octave of the bass neck, the sound gets a little weird - sounds kinda like there's a slight chorus effect going on. It's not running through anything, just my Fender bass straight into the amp head. Would this be a neck adjustment, or would it be my amp? I don't believe I've heard it on any other setup I've used, but I did move up to college and haven't had a chance to play my bass through anything else since the move.