MB Quart’s Reference line gained its name over many decades. Before being officially named this product series represented such an enhanced performance level our competitors constantly referred and compared themselves against this outstanding audio line-up. With benchmark performance above and beyond our competitors, Reference series blends technology and material unique to Reference with some Premium-Line attributes. MB Quart Reference series products incorporate proprietary and unique technologies gained from over 45-years of audio product design expertise. MB Quart Reference line-up is focused on the finer details and high quality, all with the resolution and precision of a laser beam. Leading Reference series speaker’s high standards is MB Quart WideSphere™ Technology.