The IP-BMWSUB82 subwoofers are the ideal way to improve the bass in your BMW. The ultra-slim 8-inch (200mm) subwoofer delivers accurate, powerful bass thanks to Morel’s innovative EVCT motor topology with a powerful neodymium magnet and large 2-inch voice coil. Using our DirectFit design, the BMW-specific chassis and plug-and-play connectors make for quick and easy installation into all BMW models with under-seat subwoofers. The IP-BMWSUB82 subwoofer was designed with a 2-ohm impedance making it highly efficient when used with OEM amplification. Yet, its robust design allows you to achieve best results with higher power aftermarket amplification. Impedance (Ohms) – 2? RMS Power (W) – 180. Peak Power (W) – 500. Frequency Response (Hz) – 20-1000. Mounting Depth (cm) – 4.35. Mounting Hole Diameter (cm) – 19.2. Grills – Not Included.