Musway CSB8W 20 cm (8) subwoofer pair for BMW E / F / G models 180w rms. Please note does not work with HK or pre2019 base audio models unless a new amp has been fitted. Send full vin for confirmation. 20 cm (8) subwoofer pair for BMW E / F / G models. All models are equipped with a robust yet ultra-lightweight fiberglass diaphragm and feature a dual neodymium magnet system with a solid N42H magnet. This allows for optimal sound output even with low amplifier power. The CSB8W subwoofer even boasts a 50 mm CCAW voice coil, which is very lightweight and thus achieves an astonishingly high efficiency of 89 dB/W/m. The 25 mm tweeter of the CSB4.2C component system features a high-quality titanium diaphragm and also a powerful neodymium magnet system. Both ensure a linear frequency response up to over 20 kHz and fantastic high-frequency resolution. All models have vehicle-specific connectors for easy installation. 180 watts/RMS, 300 watts/Max. Frequency range 30 – 300 Hz. 50 mm (2) voice coil. Fiberglass membrane, Nomex centering spider. Installation depth 31 mm. Installation diameter 192 mm. BMW E / F / G Model. Does not work with HK or pre2019 base audio models unless a new amp has been fitted.