I haven't used this much since I bought it. I've only used it a few times and then stored it. Currently, there's no crackling, and the effects work normally. I'm a novice, so I don't know much about the technical aspects. I will reply to comments as best as I can. Please understand the above before purchasing. Compact black effector with toggle and footswitches. - Model: Effector - Color: Black - Connections: 1/4 inch jack - Switch Type: Toggle switch - Button Type: Footswitch Thank you for looking.