3 + 3

3 + 3 is a 1973 album released by The Isley Brothers for the Epic label under their T-Neck imprint. Their first album for the label after several years in Buddah Records, it was also the first time the family group, which had consisted of founding members O'Kelly Isley, Jr., Rudolph Isley and Ronald Isley, included six members instead of the standard three. Following the recording and release of Brother, Brother, Brother the previous year, this was the first album to include younger brothers Ernie and Marvin and in-law Chris Jasper. The success of the album is contributed to their first Top 10 pop record since "It's Your Thing", with their own cover of the self-penned "Who's That Lady", now re-titled "That Lady, Pt. 1 & 2". Other hit singles included the top five R&B single, "What It Comes Down To", and their cover of Seals & Crofts' folk hit, "Summer Breeze", which was also a top ten R&B single. The album became their first platinum album.

The Isley Brothers recorded 3 + 3 in the Record Plant at the same time as Stevie Wonder was recording Innervisions. In fact they walked in on him recording "Don't You Worry Bout a Thing". Both Chris Jasper of the Isley Brothers and Stevie Wonder were users of the Arp synthesizer and both worked with visionary engineers Robert Margouleff and Malcolm Cecil.

In addition to a stereo record release, this album was mixed in quadraphonic and released in 1974 on SQ record: T-NECK PZQ - 32453. It was also released on Super Audio CD on December 4, 2001.