RC Booster and BB Preamp MB guitar effects pedal set. - Model: RC Booster - Model: BB Preamp MB - Type: Guitar Effects Pedal - Power Supply: 9V DC - True Bypass: Yes - Controls: Volume, Bass Thank you for viewing. - Power on and sound output have been confirmed at the time of listing. - Please judge the condition from the photos. - Purchased from a musical instrument store around 2010. - It has been stored in an effects pedal case since 2012. - The BB Preamp MB is a custom shop model of the XOTIC standard preamp with an added mid-boost function. This is a rare model that is now discontinued, and the hairline finish aluminum casing has a different feel from the mass-produced models. - Immediate purchase is welcome. RC Booster BB Preamp Distortion