The CX12N251 radiates a coherent single spherical wave front with perfect dispersion control. The design is powered from large sized single neodymium ring magnet that provides an extremely high flux density and BL factor. The new hyper-vented aluminium basket and magnetic assembly design provide an excellent heat dissipation and lower power compression. Special air-forced ventilations are provided for voice coil, magnet assembly and basket. 2.5-inch voice coil combined a strength fibreglass former and aluminium wire drives the mid-bass cone with high efficiency and a good extension. The 1.7-inch dome compression driver, loaded to 60° conical waveguide, provides a clear vocal output and a perfect high frequency extension.