Based on the first edition old orange Ibanez OD850 which itself is derived from the BMP, though with changes in the tonestack . The sound is close to that of the green Russian muff most, darker in character, fat, open with lots of bloom – very musical and overloaded. It has little scoop with the mid range there in force but it is less pronounced than the low end. Also it has a trim pot to dial in the amount of low end, the bottom end can get pretty massive or completely removed at extreme settings.