Audison Prima was designed to meet the interest of the car model enthusiasts who like to appreciate all the nuances of the musical message with components that are perfectly integrated in the car OEM system, preserving the most precious Prima on Audison requirement of OEM integration: space. Developed with electroacoustic parameters customized for BMW-Mini to increase listening engagement, through powerful and crisp low frequencies, exploiting the acoustic load provided by the factory box. Neodymium Magnetic group with an inverted acoustic structure featuring an internal cone, to maximize performance while minimizing bulk and weight. 38 mm voice coil wound on aluminum support for considerable power dissipation and stability even during high excursions. Two 5 mm gaskets were provided for OEM placements. The 200 mm 8 in. APBMW S subwoofers allow a direct replacement of the OEM speakers underneath the front seats, making the most of the factory acoustic load and generating deep and crisp low frequencies. The Neodymium magnet allows for greater power and control than ferrite while maintaining the depth of installation unaltered. Frequency Response 40-500 Hz. Voice Coil Ø 50 mm. Voice Coil Material COPPER. Woofer Qes 0.96. Cone Material PRESSED PAPER CONE. Driver Displacement Volume 1.2. Re 3.8 Ohm. Cms 0.41 mm/N. BL 6.3 T. M. Diaphragm Area 198.6 cm2. Le Standard 0.5 mH. Reference Efficiency 0.13. To be eligible for a return, your item must be unused and in the same condition that you received it, and it must be in the original packaging.