J.Rockett Audio Designs Mark Sampson MAX.
The Mark Sampson designed MAX pedal is a necessary tool for any player! It is a buffer / Boost / Harmonic Enhancer and can be used with Bass Guitar and Guitar since it passes low bass frequencies. You will notice an entire frequency expansion allowing you to hear extended ranges of frequency that allows for a fuller and more harmonically enhanced feel. This is one pedal you will never turn off!!!