http://www.bearfootfx.com/product/dyna-red-distortion/
Product Description
More Massive Marshall Magic!!!! The 4-Knob DRD is a product of the original way Bjorn made the BJFe DRD. It had only 3 knobs, but it also had the low mids control attached to the drive knob in reverse, so you got a beefier clean/low dirt sound and it tightened up for higher dirt settings. The new M control does all of this but also lets you use it in other ways to push the DRD into fuzzier territory or use it as an EQ for cleaner tones. A little mids can go a long way…the M control pushes low mids into the distortion generator so it also juices up the saturation and harmonic content while
increasing the frequencies you feel from a 4×12. And the Treble is post-distortion to get just the right cut. Red sparkle paint job and gold lettering.