The Hot Wax Dual Overdrive from Electro-Harmonix combines two of the company's flagship classics into one unit, the Crayon and the Hot Tubes. A very flexible stompbox, each section of the dual circuit can be used independently for unique flavors of overdrive or in parallel for a huge wall of sound. Each circuit gets its own volume and drive knobs, and the pedal features a two-band EQ (treble and bass) with a dedicated blending knob for dialing in the exact tones that you're looking for.