This is your opportunity to buy a genuine BOSE subwoofer, which is an integral piece in the BOSE Acoustimass Series 10 surround sound system. I understand that you can't buy this subwoofer seperately from Bose and as part of a full speaker system it would cost significantly more than you will pay in this auction. The unit is in good condition with very few marks on it. As many as 5 cube speakers (NOT sold here) can be connected to the subwoofers output's and once you connect your receiver/amplifier (also NOT sold here) you can sit back and enjoy 5.1 channel sound. If you don't have any or enough Bose cube speakers you will be able to easily buy them on Ebay, thats what I did. Included is the Owner's Guide but I'm sure you would be able to locate one on the internet if you want to have a look at the setup of this before you bid. I'm not sure when these speakers were made but the user guide is published in 1996. The Acoustimass is quite heavy so the auction is pick-up only unless you wish to arrange for your own courier (at your expense) to pick up and deliver to you. If you want to do this it would have to be picked up from the city, (Sydney). Good luck and happy bidding.