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 5 x 7 In./6 x 8 In. 2 Way Coaxial Speakers is loaded with 1 in. magnesium tweeters that deliver exceptional musical reproduction of high frequencies. 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 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.