Features 3 high gain Amp Models in a compact enclosure. Duo Rect: Based on Mesa Boogie Dual Rectifier. Fireman: Based on Friedman BE-100. VH4: Based on Diezel VH4 IR out for amp-less application. (512 samples resolution) True-bypass. Parameters auto saving into 3 models. Low power consumption. (less than 120mA) TSAC-HD modeling offers realistic playability and response.