Catalinbread Dirty Little Secret Overdrive Guitar Effects Pedal Super Lead: The Super Lead mode gives you the great rock sound of a Marshall Super Lead amp with awesome harmonics, touch sensitivity, cab thumb, and kerrang. Super Bass: The Super Bass mode gives you the tone and gain structure of a Marshall Super Bass (which is very similar to a JTM45, JTM50/100, or very early plexi). The Super Lead and Super Bass are two remarkably different amps, and so the DLS is essentially two pedals in one, not a two channel pedal.