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 ofthe optional MT-S0301 Matching transformer. Power Handling Capacity Continuous program: 180 W. Rated Impedance 8 ?. Frequency Response: 90 Hz - 17 kHz (when recommended parameters are applied by the optional DP-SP3). Sensitivity: 90 dB (1 W, 1 m equivalent, measured at 4 m). Enclosure: MDF, white, urethane paint. Front grille: Punched steel plate, white, acrylic paint. Dimensions: 84 (W) × 663.4 (H) × 115 (D) mm (3.31" × 26.12" × 4.53"). Weight: 4.2 kg (9.26 lb).