Two channel amp. First channe; being a Dumble Clean (Kind of like the blackface, but at little less top end shine. More mid range. Second channel is a HRM Dumble Overdrive. Also it's equipped with a mod switch on the treble knob to bump up the gain into marshall territory. Very good clean sounding amp. I sold it to G Man about a month ago. Kind of miss it, but I found myself more of a gainy slo type guy.