MXR and the 'legend' Bob Bradshaw collaborated to develop and manufacture a series of pedals, with the Boost/Overdrive being the first creation of this effort. Since 1980, Bob Bradshaw and his company have been one of the prominent suppliers of custom pedals and related products. A multitude of famous guitarists have honored Bob Bradshaw by exclusively using his creations.

Simplicity in construction is the main feature of the MC-401 Boost/Linedriver, yet its effectiveness is unparalleled and it is a unique solution when used for balancing and controlling signal levels. This becomes essential when many effects are used.

The main circuits incorporated in the MC-401 Boost/Linedriver have been used by Custom Audio Electronics for many years with great success. The MC-401 Boost/Linedriver can be used as a boost in the case of a solo when a clean, strong, and detailed sound is desired, or when an overdrive/distortion is simultaneously activated for more sensitivity and control of dynamics.