Hey, I experience this problem with my head: No matter what gain/volume settings I use, I get this horrible distorted sound. The clip light remains on or turns on immediately I play. The problem is similar to what's described in these threads: http://www.talkbass.com/forum/f15/mark-bass-head-problem-698519/ http://www.talkbass.com/forum/f15/markbass-clipping-issue-735448/ Quote from the first describes it well: I also made a video: Markbass Little Mark II problem - YouTube I tried spraying all jacks with electrical contact cleaner as suggested in the above threads, and as a matter of fact I've kept a cable in the effect loop at all times. I also tried different cables, different basses and different cabs. I'm not the only one having this problem, so somebody must know what it is?!