He began playing bass at age 12, after borrowing an instrument at school. He and his brother Lenny, now a fellow member of Aventura, often experimented together at home in duo, bass, and guitar. Lenny loves rock music and brings a touch of this genre to Aventura’s sound.
Santos also raps and is featured on the album Love & Hate on a track entitled “Don’t Waste My Time” and with Nina Sky on the God’s Project track “You’re Lying”. Max and Lenny are preparing a solo hip hop project for Max, and hope to arrange for its release later this year. He & his brother Lenny Santos have recently formed the bachata group D'Element. As D'Element, they have released one song called “You & Me”.