Taking its inspiration from legendary British guitar amplifiers, the Electro-Harmonix English Muff'n Overdrive Pedal re-creates their majesty and classic tone with spot-on accuracy. Rather than approximating these amps as do emulator products, the English Muff'n employs real vacuum tubes, including a 12AY7 cascading into a 12AX7, to produce true Brit-valve sounds that are full of richness and natural saturation.