I cannot call myself an expert on sound, but I have been involved in music for 35 years. This combo is excellent! The clean channel is very clear! With the pedals, it sounds divine! The red channel sounds very good! The booster is positioned before the overload, so it works like a heater, no additional pedals are needed. The only drawback is that the crunch on the clean channel cannot be turned on or off except with your finger, which is not convenient when performing on stage. I would like to have a three-button footswitch with the ability to activate the crunch. But even without it, the combo is fantastic!