The Tech 21 Boost Overdrive guitar effects pedals all-analog circuitry yields righteous, vintage tones with modern dependability. Designed and built from the ground up utilizing the best individually-selected, hand-biased discreet components, each unit delivers optimized performance with studio-quiet operation. Alongside a wealth of hot driven tones, there is a powerful boost function that delivers up to an incredible 21dB of clean boost, which can be used independently from the effect. It is a true post-boost, punching up the tone you dialed in, not smothering it in unwanted distortion. From the high-impedance input to the sweepable low-pass filter in the tone control, your tone will be open and controllable in every setting. Level, Tone, Drive, Sparkle and Boost knobs Modern dependability Hand-biased discrete components