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Reason is an American company manufacturing boutique amplifiers. The company was founded in St. Charles, Missouri in 2008 by Obeid Khan, who helped turn around Crate Amplifiers, and Anthony Bonadio, a speaker cabinet builder. Their SM series of tube amplifiers includes four different amplifiers; the SM25, a three-channel amp with 6V6 tubes, was called a "killer amp" by Vintage Guitar.
- Phil, Feser (May 2009). "Tag-Team Combo: The Reason SM25 Amplifier". Vintage Guitar. pp. 138–40.