Blackstar FLY103 Extension CabinetDescription Blackstar FLY103 Extension Cabinet The FLY 103 is the official extension speaker for the FLY 3 compact mini amp. The FLY 103 comes with its own built in cable to connect it to the FLY 3, making it a true stereo set up. The extension cabinet is sold seperately or as part of a FLY Stereo Pack that provides a power supply to power both units. When connected to the FLY 3 is makes a set of portable speakers to play your music through or it can