I am just starting to use 4cm with my hx effects. I connect everything correctly and put my dly ans vrb in the loop and drives up front (orange or15 is the amp). The problem I’m noticing, which may be because I’ve never done this before, is even with the volume all the way down on the master and preamp I still hear volume from the amp. Basically I cannot put the amp to a very low volume because of this. I also notice my preamp volume does not drive up the master volume at all is this how it should behave? I’m open to all suggestions. I’m not claiming to be an expert at 4cm at all. Helix systems are awesome.