The STEG BMX45CII is a two-way component speaker set specifically engineered for a seamless fit in BMW X-Series vehicles produced from 2004 onwards. This Plug&Play system allows you to upgrade your audio without cutting wires or modifying the vehicle's electronics, as it includes all the necessary cabling and a special raised ring designed to integrate perfectly with the BMW X-Series interior. Each set features 100mm mid-range speakers with rubberized, reinforced cellulose membranes and neodymium magnets, which help achieve a frequency range of 90 to 22,000 Hz. With an RMS power of 100 W, a sensitivity of approximately 88 dB, and a resonant frequency around 75 Hz, these 4 Ohm speakers provide a balanced sound profile. The inclusion of dedicated tweeters ensures that higher frequencies remain crisp, making this kit an ideal choice for drivers who want a hidden, professional installation that restores or improves the factory sound quality.