You are not allowed to disturb the peaceful enjoyment by other residents of their lots at any time day or night.
You are also not allowed to play loud musical instruments (without permission) after 10pm on weekdays and midnight at weekends in NSW or the the police can be called.
As for the tenant not caring, abiding by the by-laws of the building are probably a condition of his lease. So make him care by getting the committee or strata manager to issue a Notice To Comply – if he ignores it he could be fined and even evicted.
Finally, a short note saying something like “have you heard of headphones?” might work wonders.