HK Audio's various Lucas PA systems have established the smaller 'sub plus satellite' package as a viable format for gigging bands, but their latest offering lends a new meaning to the term 'compact'. The Nano 300 comprises a powered subwoofer plus two tiny satellites that either mount directly onto the sub, one above the other, or can be pole mounted to provide more height. Alternatively, the speakers may be spaced apart on optional tripods or mic stands, to provide a stereo spread. While almost certainly too small for typical band applications involving a drummer, the Nano seems well suited to solo acts or duos playing small pubs or bars, but the system also has applications in home theatre, sound for games, general music playback and, according to the manufacturers, even home-studio monitoring.
Please it's only used in the UK.