The SR-4.2 is a 2-way 4" component system. It uses the WR-4 (triple neodymium magnet midbass) and CR-104 (neodymium double magnet tweeter). It has great clarity and detail with precise imaging. The system comes complete with the XR-2.2 2-way crossovers. More information on the individual components can be found by clicking on the links.