Riverside... it's a culmination of everything. This is the result of our analysis of a great many analog and vacuum tube circuits. With its extremely wide coverage, rich harmonic structure, and tube-drive-like tone, it opens up a whole new world of DRIVE. The analog input stage is an analog multi-stage gain circuit using class-A JFETs. This stage is digitally controlled to send the signal to the subsequent DSP gain stage while maintaining maximum headroom. This section also faithfully reproduces the player's touch, nuances, and response to the guitar's volume, just as if it were directly connected to a tube amplifier. That signal generates a complex harmonic structure in the DSP section, which becomes the source of distortion. You can play clean, mild overdrive, high-gain lead, and heavy saturated distortion sounds—each with its own optimal sound.Condition: No issues with functionality. Points to note: None. Accessories: Box, adapter. Warranty: No warranty. Sold as is.