The KHDK No. 2 Clean Boost from Kirk Hammett's effects company convinces with its particularly harmonious sound between booster and overdrive, which can be adjusted particularly precisely. In Lo mode, for example, the effect pedal delivers an open sound with well-behaved distortions that helps the sound jump before a slightly opening amplifier. In Hi mode, on the other hand, the KHDK No 2 releases additional gain reserves that give every note played a high load-bearing capacity. The sound character can be adjusted very precisely via the well thought-out circuit with two gain stages. The gain potentiometer controls the degree of distortion as usual, while the bass potentiometer adds bass and low frequencies to a second gain stage. In addition, there is a passive hearing control for adjusting the top end.