MB Quart strives to push the boundary in perfecting sound from speakers. The top of the line, Premium Series speakers truly makes Music—Defined. This pair of audiophile Premium Series 6-1/2 In. 2-Way Component Speakers is loaded with external magnesium tweeters and external audiophile crossovers for exceptional music production. The series' WideSphere technology has a removable phase lens to create a larger-than-life soundstage. And the Curvilinear Cones provide strength and superior bass frequency reproduction. The MB Quart Premium Series will offer you levels of clarity, coupled with rich quality sound, creating superior audio for all of your playlists that simply demand the best.