The Electro-Harmonix Nano Operation Overload is a paired-down, more-compact, and mono version of a previously released distortion pedal. This pedal relies on three JFET gain stages to give you a saturation similar to a tube amplifier.
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\r\nIn addition to its normal overdrive operation, the pedal offers a selectable Boost button, as well as a footswitch input to control the boost by means of your own separately available footswitch. You can use the Boost circuit with the pedal's inherent distortion to juice the distortion even more, like adding a stompbox overdrive pedal before the JEFT stage to increase the overall saturation.
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\r\nThe pedal offers a three-knob tone stack, as well as a three-position input level selector to better accommodate all sorts of instruments including single-coil axes, humbucking guitars, and modern and vintage keyboards alike. Along with the customary Volume and Gain controls, you'll also find a Dry knob to add unaffected signal back into the circuit. This is particularly useful with basses and keyboards, which often require that some of the original harmonic integrity to be preserved. A power supply is included.