The Tech 21 SansAmp Classic is a compact unit with a wide range of amp sounds you can achieve without an amp. It is made almost entirely by hand, and the main module contains a bank of eight Character switches, which adjust tonality, harmonics and dynamics. A three-position Input switch gives you a choice of pre-amp styles: Lead (Marshall®-style), Normal (Mesa Boogie®-style), and Bass (Fender®-style) and it is designed for rhythm as well as bass guitar. The controls shape pre-amp contours, power amp contours, volume and final tone. The SansAmp Classic is engineered with a flat output to provide maximum flexibility and control with external EQ.