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Dual boost pedal with two completely independent boosters, Vintage and Clean. Clean Boost allows to cut your sound through the mix without affecting your original tone. Vintage Boost has a natural high frequency roll off, which gives a soft saturation to an amp and power to guitar sound. The maximum gain of both boost channels is approximately 20dB. Each boost channel has its own input/output, allowing various setup when using another effect pedal between both channels. True bypass switching (TBS) using 3PDT mechanical switches for both channels. Operates with 9V battery or external power supply in 9V or 18V (for more headroom and dynamics).