Hard rockers AC/DC have launched a special web site, ACDCBacktracks.com, featuring a countdown to an "exciting announcement" that will be made on September 29.

A short video clip promoting the new web site can be viewed below.

As previously reported, AC/DC is rumored to be releasing a box set later this year that will come in a package that doubles as a working amplifier. The set will contain three CDs, two DVDs and a vinyl record. One CD will contain studio rarities and the other two will feature live cuts, while the DVDs will contain the third volume of the band's 'Family Jewels' video collections. The vinyl disc will hold the studio rarities. The set will also come with a 164-page book, three black-and-white lithographs of unpublished band photos from 1977, a flyer for a 1976 British tour and a poster from a 1977 European trek. The complete package will be sold only through AC/DC's web site, while a CD/DVD-only version called 'Best Of The Box Set' may also be made available.

AC/DC Backtracks Sneak Peek 9/24