Vertex Effects Dynamic Distortion MK IIThe Dynamic Distortion is based on mods we preformed for many iconic users of the Maxon Sonic Distortion (SD 9). The SD9 is good stock, however the pedal has some shortcomings that many of its users find undesireable the tone control is unuseable in most positions, there isn't enough output with the guitar volume rolled down, the gain range is limited, and the tactile on off footswitch engages intermittently. With the Dynamic Distortion, we took this