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Cello Ltd. was a pioneering high-end audio company founded in 1984 by legendary audio engineer Mark Levinson after leaving his previous company. Operating from 1984 to 2000, Cello revolutionized the luxury audio market with innovative products like the Audio Palette (world's first audiophile equalizer), the modular Audio Suite preamp, and the Grand Master Reference system. Based in the United States, Cello was unique in being founded by a musician rather than an electrical engineer, focusing on creating radically new audio concepts at stratospheric prices. The company pioneered the total system approach, selling complete audio solutions rather than individual components, and maintained exclusivity through only two dealers nationwide in New York and Los Angeles.