Hi,
I have an MJ Acoustics Ref100 120watt Sub-Woofer for sale.

Product description Here :
http://www.mjacoustics.co.uk/MJ_Acoustics/Product_Archive/Ref_100.htm
The item shown in the illustration on the above webpage, is the version I have.

Also shown Here :
http://www.audioaffair.co.uk/mj-acoustic...CFYjjwgodlAIAYA

The item is in 'as new' condition and in perfect working order and was only used at home with my Technics KN7000 keyboard, in my music studio.
However, I have now moved my KN7000 into my house and no longer use the Sub-Woofer.

The current new price in UK is around £650 and I would accept £200.

The item is quite heavy and so I would prefer collection in person, rather than trust it to any carrier....... I am located in Richmond, North Yorkshire.