All our OEM speaker upgrades come with the brackets and wiring connectors for direct Plug & Play installation. By Using high efficiency drivers and Neodymium motors we are able to keep the speakers lightweight and easy to install. Now available in both 2 Ohms and 4 Ohms models giving the ability to upgrade the BASE system as well as the BMW HIFI and HK using the 2? Variant which is more suited to the factory amplifier. Speaker Size: 8? (200mm). Peak Power: 345 watts. RMS Power: 115 watts.