Electro-Harmonix Hot Tubes Overdrive

For your consideration, Garrett Park Guitars presents this Electro-Harmonix Hot Tubes Overdrive. 

From the EHX website: 

The Hot Tubes' unique pericyclic filter makes it a most versatile distortion device. From warm overdrive to vacuum tube Big Muff sustain to the heaviest metal tube-driven screams, you won't find a creamier distortion than the Hot Tubes. Powered by AC adapter and toroidal transformer that drives two Electro-Harmonix tubes to maximum voltage!