http://solidgoldfx.com/products/zeta-high-gain The High Gain Zeta is a fine tuned, supercharged variation of our Zeta overdrive circuit. The High Gain Zeta features a crunchy, highly responsive drive section that is smooth and articulate with great amp like saturation and an incredibly low noise floor. With more focused muscular mids and a wide-ranging tone sweep, the High Gain Zeta cuts like laser all without being overly harsh or buzzy while its unique JFET based preamp lends just the right amount of sag and subtle compression. If you are looking for an excellent distortion with distinct character and feel plug in to the High Gain Zeta!