A rare and awesome sounding preamp/booster from Boss, they didn't make these for very long and it's in a slightly different form factor. These are designed to go on your belt/guitar strap rather than the floor, so have no power input or footswitch. It sounds fantastic pushing a valve amp and is a little bit different to your run of the mill overdrive. Most famously used by The Edge of U2

Rockbottom Music has been serving London and the South East with musical equipment since 1974. Our shop in Croydon is open 9:30-18:00 Monday to Saturday and you are always welcome to drop by and try out any instrument you are interested in purchasing. All second hand items are serviced and setup by our technicians and are in full working condition. Visit rockbottommusic.co.uk for more.