Specs: * 2000 W Program Power. * 99 dB Sensitivity (1W/1m). *Great replacement driver for most bass reflex applications. * Vented chassis and motor design provides efficient thermal management and extremely low power compression. * High BL factor, 25.9 T/m. Dual ‘spaced’ suspension system and advanced materials offers ultra-linearity, mechanical stability and superior acoustic performance at high levels of excursion. * Ribbed, fibre loaded, UK manufactured cone offers increased strength, durability and resistance to deformation under extreme loads. * Designed for optimum use in 100-250 Litre ported enclosure designs. * 4-inch Inside/ outside windings copper voice coil.