The STEG BM45CII is a two-way component speaker kit designed specifically for the factory locations of BMW E series and F series vehicles, as well as MINI models. This Italian-made system allows for a seamless installation without the need to cut or modify your original wiring, thanks to its plug-and-play design. The kit includes two 100mm midrange speakers and two 25mm tweeters, connected via cable crossovers to ensure a balanced sound distribution. Each midrange driver features a rubberized cellulose paper membrane and a neodymium magnet housed in a cast aluminum basket, providing a power output of 30 W RMS at 4 Ohm. These speakers are designed with a shallow mounting depth of 36 mm to fit precisely into the vehicle's door panels. Complementing them are the tweeters, which handle 25 W RMS and extend the frequency range up to 22,000 Hz, ensuring that high-frequency details remain clear and crisp for the listener.