The Macintosh IIsi is an Apple Macintosh model in the Macintosh II series produced from 1990 to 1993. Announced at the same time as the Macintosh LC, the IIsi was the first Macintosh to ship with built-in sound-in capabilities. The LC also had a sound-in port but did not ship until later. It was introduced as a low-cost alternative to the professional desktop models for home use, but offered more features and performance than the LC series.