High-Frequency Driver Components 1" Beryllium dome with acoustic lens waveguide; Mid-Frequency Driver Components 5.25" DCC aluminum cone with cast frame; Low-Frequency Driver Components Dual 8" Deep Ceramic Composite (DCC) Aluminum Cones with cast frames; Frequency Response (- 6DB) 27Hz - 44kHz; Recommended Amplifier Power 50 - 350 Watts; Crossover Frequencies 260Hz; 2.1kHz; Nominal Impedance 8 Ohms; Sensitivity 90dB (2.83V @1M); Finishes High-gloss Black, White, Walnut and Metallic Silver; Dimensions (H X W X D) 46.6" x 13.5" x 14.8" (1182.5mm x 341.8mm x 375.3mm); Net Weight 82 lbs / 37.2kg