Frequency response: 30 Hz – 32,000 Hz Impedance: 4 Ω Maximum input power: 350 W Nominal input power: 80 W Sensitivity: 90 dB Series: A-Series Diameter Size: 6 x 8 inch Dimensions: 204 mm (W) x 71 mm (H) x 145 mm (D) Open & Smooth™: IMPP™ Composite Cone: Magnets: Ferrite Woofer material: Carbon & Mica reinforced Injection Molded PolyPropylene (IMPP™) Cone Other Specifications speakers Cut-out Hole: 133 x 191 mm Mounting Depth: 62 mm Speaker Grill: Not Included Weight: 0.71 kg