Spector, who worked with The Ronettes, The Beatles, Cher and Leonard Cohen at the height of his fame, denied murdering Clarkson but did not testify at either trial.
He has been held in custody since his April 13 conviction after being free on bail following his arrest in 2003.
Prosecutors said the shooting of Clarkson was part of a pattern of gun play and violence that Spector displayed toward women over the past 20 years, saying he had a problem with rage and was "a bully".
Spector's lawyers claimed that Clarkson was depressed about her failing career and had committed suicide.
She worked as a hostess at the House of Blues in Hollywood when she met the man who produced songs like the Righteous Brothers' hit "You've Lost That Lovin' Feelin'." Clarkson starred in such little-known movies as "Barbarian Queen" and "Amazon Women on the Moon."
Clarkson's family has also filed a wrongful death civil suit against Spector which has yet to be heard.
Spector had a troubled early life. His father committed suicide, his sister spent time in mental institutions and Spector suffered bouts of severe depression.
Shortly before Clarkson was shot, Spector told British journalist Mick Brown in a rare interview that he had a bipolar personality and had "devils that fight inside me."
In 2006, he quietly wed for the fourth time, marrying model/actress Rachelle Short, who is about 30 years his junior.
(Editing by Jackie Frank)
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