Sorry, I forgot to mention that I have all rear switches on all boxes set to “in line” since they are going through the effects loop. The Marshall also has a +4db / -10db button on the FX loop, it recommends +4db on rack effects and -10db for stomp boxes…. Could my signal drop be due to this? If I set the rear button of the stomp boxes to “in line” are they now like a rack effect unit?
