Different saxophone family members are employed to provide a larger range and a variety of tone colours.
The saxophone was developed in 1840 by Adolphe Sax, a Belgian instrument maker, flautist, and clarinetist based in Brussels.
[1] The main impetus for the recognition of this ensemble was by Marcel Mule, who was the second Professor of saxophone at the Paris Conservatoire after Adolphe Sax himself.
Notable composers who have written quartets include Phil Woods, Alexander Glazunov, Eugene Bozza, Philip Glass, Juan María Solare, and others.
Other configurations do exist, notably the Four Baritones Quartet (BBBB)[5] and Deep Schrott (BassBassBassBass)[6] but are much rarer.