Controversial radio host Alan Jones didn't confine his alleged sexual abuse to behind closed doors, according to court documents which say he assaulted his alleged victims in public and while they were driving him around.

The 84-year-old had been accused of historical sex offences against 11 people - the youngest of whom was 17 at the time - over two decades when he dominated Sydney's airwaves.

Court records show Jones faced 44 charges before the case against him underwent a reconfiguration in Downing Centre Local Court on Tuesday.

Crown prosecutor Emma Curran withdrew more than a dozen charges and amended others, leaving the broadcaster on 25 charges of indecent assault and two of sexual touching against nine people.

Prosecutors did not explain in court why the charges related to two

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