Electro-Harmonix Op-Amp Big Muff Pi Distortion Pedal

Made famous by the like of the Smashing Pumpkins and other musicians throughout the years the original Op-Amp pedals fetch high prices for their coveted tone. Mike Matthews and EHX set out to not only make modern improvements to the original design such as a compact die-cast chassis and true by pass switching, while keep the price affordable for the masses. Check one out for yourself and see what all the hype is about.