After reading through all posts and linked threads here, I thought I finally understood on how to set the EP4000 to bridged mode:
2 Doesn't matter
9 Doesn't matter
^ right knob (channel two) should be turned 100% fully counterclockwise to the - infinity label
^ left knob (channel one) should be maxed by turning fully clockwise // note: I had to turn it down to approx. 10 o'clock /...