The Fredric Effects Blue Monarch overdrive is based on the popular Blues Breaker overdrive of the 90s, with the mods offered by the KoT version of this circuit with the long waiting list! We've redesigned the layout so all four controls are external, added a toggle switch to replace the DIP switch functions, and added a switchable boost stage because we were never quite happy with the overall volume of the BB/KoT. We've also slightly increased the maximum gain available, to make this a very versatile pedal.