Boost / Buff

The Boost ‘n’ Buff is a booster and a buffer pedal that should be an essential on every pedal board, whether to keep your original guitar tone intact or to boost the signal in three different ways; FULL, MID and TREBLE. The super quiet, Class A (single transistor) design provides a huge 35dB boost when engaged and acts as an ultra high input impedance buffer (5MΩ!) in bypass mode, or (new for V5) true bypass if desired.

http://miaudio.com/effects/boost-n-buff-v5/