Hey guys, First time posting here. I did a lot of Google research before deciding to register and post here and couldn't find much useful information regarding this. There are 4 knobs total on my active bass. Two of them have tiny knobs on top of the bigger ones. I think they might adjust treble and mids. I'm not really sure, to be honest. A long time ago one of the smaller ones got bent (making the knobs kind of operate as one now because they both move together since it's so tight), and I have no idea if this is just as simple as taking the knob off and bending part of it back straight, or if I have to buy a completely new knob. I took my bass to a shop a long time ago and the guy told me he would have to special order a knob for me and it would be really expensive to fix, but I wasn't sure if he was trying to take advantage since I don't really know.