On 18th of November 1967, Jack got married to Morgan Fairchild. Morgan Fairchild is an actress and she is also known by the name Little Bird. As a married couple, they were together for about six years and then they got divorced on 28th of February 1973.
Few months later after Jack got divorced with this first wife, he began his romantic love affairs with his girlfriend Lynn Lenau. Lynn Lenau is a filmmaker and they got married in 1975. They got divorced in 1989.
In 1989, Jack also got married for the third time in his life and that was with Susie Calmes. Susie was his partner at Syncrolite. She also served as the fashion director of local boutique retailer Tootsies. At the later stage of her life, she is serving as a Master Gardener.
As Jack's mother was also a great musician, he began his interest in music at a young age. He began playing guitar and graduated in guitar when he was aged 15 years old. He joined Highland Park High School. He formed his first band, the Jade with his school mates. He graduated from there in the early 1960s and then he joined Southern Methodist University. He also continued to perform locally. While he was in Southern Methodist University, he majored in engineering but later he got transferred to business school and earned his degree in accounting. In 1965, he co-founded a sound equipment provider company Showco. He has also produced several movies and TV shows. His nationality was American and his net worth was in millions during his death. He died of cancer in the early 2015.