Trans-Audio Mini 281 are completely compatible with Trans-Audio SW sub-woofers and can be stacked directly on any one . Due to its exceptional sound quality, its power capacity, and its fast and easy rigging, Trans-Audio Mini Line array series are intended for daily use in touring companies, as well as for permanent installation in theatres ,congress centres or arenas. Also, the choice of the present digital processor is to optimize fre-quency range to reach all expectant condition.