Well, Suck Slider might be more appropriate, but "Knob" sound a lot better. We opened for a somewhat well known cover band with a following. During our set, several times, the volume on the monitors was brought down. When it happened I could heard the vocals echoing around the club from the FOH. The drummer was getting lost, the singers were cupping their ear. Afterwards, we talked about what happened. No one could hear anyone else, we made mistakes, the drummer stopped playing when he couldn't hear anything. Were we victims of the Suck Knob? I asked some friends, they said it sounded good out front. The bass player of the headlining band said we were the best band that ever opened for them. At least we got that.