Reactivation and initial success
In early 1969, the brothers decided to reactivate the T-Neck label, which Ron Isley would later say was inspired by their stay at Motown due to the fact that Gordy, a black record executive, had virtually helped the label become a multi-million selling company. Ron was made president of the label while his brothers Kelly and Rudy were vice presidents with Kelly being the main leader behind the records' distribution deals. After seeking several labels, the brothers eventually signed a distribution deal with Neil Bogart's Buddah Records, which had agreed to oversee many of the label's releases. The Isleys then formed a new publishing company titled Triple Three Music, which would be their main publishing company for their works.
The label's first official release was the funk anthem, "It's Your Thing" (1969), which turned to be a huge success, peaking at #1 on the R&B singles chart as well as #2 on the pop chart, and selling over a million copies. A parent album, It's Our Thing (1969), peaked at #24 on the pop chart, marking it their first simultaneous success after years of being a mid-range successful act. The brothers signed other acts such as Judy White and Baby Cortez during that time and had the singers recording their own music. The brothers released two more albums in 1969 including the live release, Live at Yankee Stadium and The Brothers: Isley, which boasted their second top 40 hit, "I Turned You On". Other releases included Get Into Something (recorded in 1969 but released in 1970), The Isley Brothers Way (1970) by Dave "Baby" Cortez, Privilege by the act of the same name, and 1971's In the Beginning, the brothers' Jimi Hendrix tribute album.
Most of the Isley Brothers' records were backed by a team of musicians ranging from different areas including legendary rhythm guitarist Charles "Skip" Pitts who, following the recording of Get Into Something (1970), left the Isleys to back Isaac Hayes' band where he created the memorable guitar riff for Hayes' signature hit, "Shaft". It was Pitts that delivered the memorable guitar riff for "It's Your Thing". Contrary to popular belief, the future members of the group Marvin Isley and Rudy Isley's baby brother-in-law Chris Jasper didn't contribute to their recordings at the time as they were each attending college. Ernie Isley, who had joined his brothers' band as a drummer, played bass on a majority of their 1969-1970 recordings before switching over to electric guitar after he had been practicing the instrument for a while.
By 1971, the Isleys had changed much of their musical direction away from the boisterous funk styled from "It's Your Thing" into a more subdued form of funk with hard rock elements. The results were the albums, Givin' It Back (1971) and Brother, Brother, Brother (1972), both of which were notable for gospel and funk influenced interpretations of rock songs such as "Love the One You're With" and "It's Too Late", which resulted in chart success. In addition, the 1972 release of Brother, Brother, Brother would include three notable hit singles including the top 40 hits, "Pop That Thang" and "Work to Do". It was also the first official album to include Marvin Isley and Jasper on bass guitar and keyboards respectively. Following that release and another live album, The Isleys Live (1973), the brothers left Buddah after their contract ran out. Seeking a bigger label to distribute their releases, CBS president Clive Davis signed the act to the Epic subsidiary in 1973. Afterwards, Ernie Isley, brother Marvin and Jasper became the new official members of the band.