Like the classic Dirty Little Secret, the Red Edition has two distinct tonal profiles that you can experiment with. Inside the housing of the pedal, you’ll find its first secret — the SL (Super Lead) /SB (Super Bass) mode switch. The pedal ships from Catalinbread in Super Lead mode, and we recommend that you experiment with it before you put it onto your pedalboard. Once you’ve got a handle on the blistering high-gain tones of SL mode, unplug the pedal and open up the back to slide over to SB mode. Super Bass mode reconfigures the EQ and provides in-between gain levels. The SL/SB switch is like having two gain pedals in one!