Can bose systems from usa be used here in Australia?

Question

will i need to buy a transformer

Answer 1

You can always adapt them ... BUT why buy Bose?

They make horribly overpriced, mediocre products that are beaten out on a performance basis (poor midrange, cheap components, non-standard connectivity) by many other brands/models for much less money.

The only people who buy Bose are those who believe the ads (aimed at the ignorant and gullible). Anyone with any real knowledge and an open mind shuns Bose.  You never see them on a recommended list from any professional music authority (e.g. equipment reviewers). See the article at the link for details.

Answer 2

Yes you will have to buy a transformer, unless you get a model made for Australia