Subdecay Blackstar or Stupid Box in Effects and Processors Posted October 26, 2006 Originally posted by Brian Marshall The oversaturation should really only happen with the upper drive knob past 3:00. I have pickups with lots of output though. Originally posted by Brian Marshall If you are getting oversaturation through out the whole range, i suspect there may be something wrong with the pedal. I can take a look at it if you'd like. No, not through all the range, just some of it. The effect is biased correctly though.