When you run your signal from your instrument to your amp though long cables and through a large array of effects with varying impedance, there"s bound to be some signal degradation. Placing the MC406 Buffer in your signal chain addresses this issue. It"s a low-noise buffer in a small, rugged housing; it can add up to +6dB of gain with the front-facing gain slider; it makes up for signal loss that can occur when combining effects with different impedance levels; it fine-tunes signal recovery with Hi and Lo cut switches; it has an extra output for a tuner, separate effects chain or amp, and can be set to receive either a buffered or unbuffered signal; it also features a convenient 9VDC power output jack which provides power for another pedal. The MC406 Buffer is truly a mighty utility with a small footprint-an ideal addition to any effects rig or pedalboard!