England begin their defence of the Ashes in Brisbane on 25 November
Tickets for the Ashes became available to England fans on Tuesday, but Cricket Australia does not expect the same "tidal wave" of interest as in 2006.
Around 80% of tickets for the 2010/11 series are kept aside for Australian Cricket Family members.
The remainder will be released for sale from Tuesday until Thursday.
An estimated 42,000 England fans travelled to Australia in 2006, but Cricket Australia expects the economic downturn to affect sales this year.
The Barmy Army
tell us there is strong interest, but we don't expect the same tidal wave as 2006," said Peter Young,
public affairs general manager.
"The economic situation has changed and the British pound is now far weaker in comparison to the Australian dollar.
"The 2006/7 series was the biggest we've hosted, but we still expect this year's Ashes to be the second biggest."
England will begin the defence of their crown in Brisbane on 25 November before the series heads to Adelaide.
Tickets for both those Tests are available now. Sydney tickets go on sale on Wednesday, with Melbourne and Perth available from Thursday.
The majority of tickets are sold to members of the Australian Cricket Family, who must be Australian residents.
Cricket Australia expects to sell out at least the first two days of every Test, except Melbourne, which has a far higher capacity than the other four venues.
A spokesman for the Barmy Army, the collective name for England's travelling fans, insisted demand is even higher than in 2006, but that sales might be slower.
"Last time, everyone was very excited having won back the Ashes for the first time in 18 years, and there was a lot of uncertainty about the ticket situation. I think a lot of people panic-booked," Paul Burnham told BBC Sport.
"This time, the system is different and people can take their time. You can even wait until after the first Test in Brisbane and still have time to book a package for the second Test - albeit at premium price.
"People might be waiting for the exchange rate to change or seeing what happens with the economic situation."
England's impressive travelling support in 2006/7 were rewarded with a limp performance on the field as an Andrew Flintoff-led team were whitewashed 5-0.
"The performance four years ago will have put a few people off," said Burnham.
"But I think the real cricket fans recognise that England are a different team this time around, as are Australia, who have lost some massive names since then."