Empress Effects Multidrive - Manual (Page 6)

Quick Start
Set the knobs and switches to match the picture above. If the blue
bypass LED is not already lit, press the bypass switch to engage the
Multidrive. If the red, yellow and green LEDs are not lit, press the
select switch to change states and engage all 3 channels. Now use
up the individual fuzz, overdrive and distortion volumes to blend
them to taste.