Diamond Pedals 902 (Nine Zero Two)The Nine Zero Two is a versatile yet simple overdrive distortion based on multiple discrete transistor gain stages placed in series. Each stage in the uses a different type of gain circuit, resulting in a complex, nonlinear amplification response a response that approximates the rich harmonics of overdriven tube gain stages. Weve also included a simple, amp like tone stack to complete a very familiar overdrive package. Underlying this outward