Carl Martin Greg Howe`s Lick Box.
Carl Martin says:
“You can use either the High Gain or Crunch channels on their own (and they are awesome!), and you can adjust the tone for each with it’s dedicated Tone control, and yes, you can also add up to 12 db of crystal clean Boost to either of those channels….but you can also turn on both gain channels together! By placing the High Gain first in the chain, you allow the Crunch voicing to overrule the High Gain while adding a few db to your volume. You lose some of the lows and highs, but this results in a focused and controlled mid-range that cuts through the mix. Of course you can add up to 12 db of clean Boost as well for meatier leads dripping with tone and sustain!”