The Clarity control knob on the Damage Control Liquid Blues Dual Tube Overdrive Pedal enhances articulation even when higher gain setting are used. From clean compressed boost to sustained bluesy overdrive, the Liquid blues delivers musical, transparent tone. Level, Drive, Opto Comp, Clarity, and Treble controls plus engage and boost buttons give you a full slate of tone-shaping options. Dual 12AX7 tubes biased at 250V internally, with switchable Nuclear gain boost, aluminum die-cast chassis, remote switching, true bypass, and comprehensive LED indicators. Use it in front of an amp to add an additional hot-rodded amp channel!