I purchased this on Amazon the week before last. I am selling it because I bought an amp that can be used with effects pedals via an app. RAT II effector with a variety of distortion and filter functions. - Model name: RAT II - Controls: DISTORTION, FILTER, VOLUME - Connectors: IN, OUT, 9V-DC - Accessories: Instruction manual - Color: Black Thank you for viewing. Please understand that I have used it for two weeks. There is no crackling or noise.