#10 was overall the band's twelfth studio album, but only the tenth to feature lead vocalist Burton Cummings. (Their first two studio albums featured vocalist Chad Allen, and were jointly credited to Chad Allen & The Expressions/Guess Who?, i.e. both group names appeared on the album cover.)
#10 was also the tenth album The Guess Who recorded for the RCA label, if the 1972 Live at the Paramount set is included.
A Quadraphonic mix was available on both vinyl and Quadraphonic 8-track tape formats.