Line array speaker forms a linear sound source by the internal speaker units arrayedvertically in close proximity. It can be used for high-impedance applications with the installation of the optional MT-S0301 Matching transformer. Speaker Component: 7 cm (2.8") cone-type × 9. Continuous program: 180 W. Rated Impedance: 8 ?. Frequency Response: 80 Hz - 18 kHz (when recommended parameters are applied by the optional DP-SP3). Sensitivity: 92 dB (1 W, 1 m equivalent, measured at 4 m). Bass-reflex type, white, urethane paint. Front grille: Punched steel plate, white, acrylic paint. Dimensions: 84 (W) × 668.4 (H) × 115 (D) mm (3.31" × 26.31" × 4.53"). Weight: 4.4 kg (9.7 lb).