The Marble Drive is a pedal that is inspired by the Ramble FX Marvel Drive. It features several controls to shape your tone. The High/Treble control allows you to adjust the high frequencies, while the Normal control adjusts the overall tone. The Master control adjusts the overall volume of the pedal. There is also a Presence control that adds a presence or brightness to your sound. Additionally, the pedal has a toggle switch that allows you to choose between 18V or 9V power supply options.

Summary created by AI from the original source.