I have a GSR200 made in early 2006. I have a question about the control knobs on this bass. Does this model have a separate volume control for the front pickup and another volume control for the rear pickup, or does it have one volume control and one balance control? I noticed that the top left control (as I look down on it) clearly controls volume. If I turn it down, and turn up the top right knob, I get no sound. I'm not sure if I have a volume/balance setup or a P-pickup / J-pickup volume controls. I just got this bass, and I haven't played with it enough to try to figure out what I have, but I knew that some helpful soul would help me out on this.