ROYAL FLUSH OVERDRIVEROYAL FLUSH Royal Flush is a dual channel overdrive with separate controls for each channel. The first channel is a low gain overdrive and is designed to create tube amp early break up overdrive for rhythm tone with tone clarity. Second channel is a medium gain overdrive and is designed to capture creamy and rich sound of an amp like distortion crunch. Both channels engaged emulate a more aggressive cranked tube amp sound with tons of sustain.