When MR JAX is engaged, perform a double press to activate the Mid Boost. Once the Mid Boost is engaged a short press will turn off the Mid Boost but still keep MR JAX engaged.
We specifically placed the Mid Boost before the op amp gain to achieve greater saturation as well as a nice volume boost. We've designed it to add just enough volume boost and saturation to immediately jump you into lead territory no matter which Gain Stage you are in. 25% Gain Stage will have the most volume boost and saturation and vice versa, 100% will have the least volume boost and saturation.
The Mid Boost is also designed to increase the "Golden" mid frequencies to make your tone jump out in the mix!