Everyone who decrees these innovations to his BMW vehicle, can look forward to significantly better sound in combination with higher power handling. Time to say goodbye to your ex-factory sound! All models are equipped with a stable,  nevertheless ultralight fiberglass cone and feature a dual neodymium drive with solid N42H magnet. This allows optimum sound even with moderate amplifier power. The CSB8W subwoofer is equipped with a 50 mm CCAW voice coil, which – due to its lightweight - achieves an amazing efficiency of 89 dB / W / m. The 25 mm tweeter of the component system CSB4.2C comes with a high-class titanium dome and also a powerful neodymium magnet drive. Both ensure linear frequency response up to over 21 kHz and a fantastic treble resolution. All models have vehicle-specific connections for easy installation.