Inspired by vintage solid-state studio microphone pre’s from the 70s and 80s, the 228 PRE is a unique design tuned for guitar using a discrete transistor topology. The two gain controls, INPUT GAIN and OUTPUT GAIN both change the feel and character of the signal, giving a responsive feel under the fingers. The 228 PRE enhances the guitar tone like a great overdrive can, but without clipping the signal. Its like an overdrive for your clean tone. Using the gentle-slope HF (high frequency) and LF (low frequency) controls, the signal can be shaped to suit the amp and other pedals in the chain. Slight adjustments can make your tone fat and responsive, or make some more extreme adjustments to use the 228 PRE boosting the midrange into an overdrive. Everything from full range to treble boosting is available with these controls.