MB Quart Formula 5.25 inch 2-way coaxial car speakers - Creative Audio
MB Quart Premium Series Speakers - YouTube
Amazon.com: MB Quart FKB116S Formula Slim Mount Car Speakers (Black, Pair) – 6.5 Inch Coaxial Speakers, 60 Watt, Car Audio, Internal Crossover, 1 Inch Tweeters (Grills Not Included) : Electronics