Phil, who had been serving a 19-year prison sentence for the 2003 murder of actress Lana Clarkson, died on Saturday, a month after he was initially hospitalised with COVID-19.
An official cause of death will be determined by the medical examiner for San Joaquin County.
She died of a gunshot fired into her mouth while she was in Spector's mansion.
Spector produced 20 top 40 hits between 1961 and 1965 and went on to work with the Beatles, the Righteous Brothers and Ike and Tina Turner. They scored a hit single in 1958 with a song titled after the inscription on his father's headstone: "To Know Him Is to Love Him".
By the 1970s, Spector began to earn a reputation as a gun-carrying eccentric, with controversy soon surrounding the producer in the decades that followed.
Spector's lawyers argued Clarkson could have killed herself at Spector's home.
Writing yesterday about her ex-husband's death on Instagram, Ronniesaid "he was a brilliant producer, but a lousy husband".
When he was just 17 years old and performing with the Teddy Bears, Spector had a top 10 hit in the United States with To Know Him Is To Love Him.
The Wall of Sound was used to record Spector's studio acts and gave us hits by The Crystals, The Ronettes and The Teddy Bears.
Born Ronnie Bennett in NY, as a teenager the singer formed a group with her her sister Estelle and cousin Nedra Talley that evolved into the Ronettes. "Darkness set in, many lives were damaged".
The question of how to assess Spector's imperial run in the 60s was raised online, with numerous discussions about how best to view those recordings.
Mentored by the seminal rock "n" roll writers Jerry Leiber and Mike Stoller, who also were Jewish, Spector soon made his name as a producer whose distinction was to front singers with big voices and expansive ranges against a "Wall of Sound" - layers on layers of instruments and choralists.
Spector was convicted of murdering Clarkson, an actress, in 2009.