(2) RE Audio REX6.9 6x9 400 Watt 3-Way Car Speakers+(2) Sealed Enclosures REX69 RE Audio REX69 Full Range Coaxial Car Audio Speakers. Surround: Rubber. Black Polyester Diaphragm: Black Silk. Configuration: 3-Way Frequency Response: 45-20,000Hz. Efficiency: 91dB. Fo (Lowest Resonant Frequency): 70Hz. Crossover Frequency: 2,500Hz Rockville RS6X9PR (2) Single 6" x 9" Wedge Speaker/Subwoofer Boxes. Machine precision cut mounting holes. 5/8" USA Heavy Duty MDF Construction Top of the line Glue for extra durable adhesion. High quality GOLD spring loaded terminals Designed, tested, and engineered to work with most of todays popular speakers and woofers. These enclosures are built with the quality additives needed to maximize the performance of any sound system.