The S.O.S. buffer is a unique buffer not based on the standard opamp style circuit. We feel this is the most effective buffer on the market with what we call a recovery control for retention of highs. Some buffers tend to thin your tone and some applications are less optimal for the use of a buffer. The recovery control let's you fine tune your signal to make it as natural sounding as possible when running multiple pedals. We have found it to be a must have in our pedal boards.