I've found the best way to use channel 3 is with a nice OD pedal in front of it. The EQ can be helpful, but I prefer not,to use it most of the time. I've also found that turning up the presence and then jacking your channel EQ settings really opens the amp up. It does, however, cause a lot of top end buzz. Which is why I prefer to use a lower gain setting around 10-11 o,clock and push the front end with an OD pedal. This is also using the mark ii voicing selection. I feel like he miss get way to nasally with the Mark iv setting (even though I loved my lead channel on my old Mark IV combo) and extreme is an entirely different animal. The mark ii voicing has the most depth to me. And when I say crank your channel EQ, turn the treble up to 1-2 o,clock to really get some gain moving through your preamp. Then turn the mids and lows up to 12 o,clock and adjust accordingly. I go up from there to really squeeze out preamp gain and tone. Things will actually balance out when everything is above that 12 o,clock mark and push the power section of your amp (which will also be opened up by a having the presence boosted a bit as well, around 2 o,clock). And last, but never least, milk this channel using your tone and volume controls along with your right hand dynamics. I still have issues really dialing this channel in. To the point that I M going to ask boogie about retubing options. But so far, this is the best sounding configuration I've found. And I always use these amps at full power. Hope this helps brother.