In my jazz style bass. it appeared after adding the tech 21 bass driver into my setup. I can crank both pick up volumes up but as soon as I turn my turn my tone knob to 1 or higher...... I get a good present buzz that only goes away when I touch or mute the strings. The buzz stays the same regaurdless of what level the tone knob is at. All the grounding and connections appear solid to me. I have a feeling I could have cooked the capacitor by using the bass driver. Does this sound like a very possible explanation for this tone knob developing a noise A guitar tech guy will soon be with me to fix it.