The R1850DB is a dynamic 2.0 active bookshelf speaker housed within a MDF frame. The woofers on this model produce a quality sound and swift execution. The bass of this model vibrates any room or space it occupies. The additional subwoofer output allows you to add a subwoofer to transform this model from a 2.0 system to a 2.1 system. The R1850DB is exemplary and