Wharfedale - Diamond 250 (Black) Full-Range Bass and Highs, True Reference-Level Performance Soft-Dome Tweeter, 5 1/4 Kevlar Midrange, Dual 8 Kevlar Woofers Layered Cabinet Construction and Stylish Looks 3-way floorstanding speaker -Enclosure type: Bass reflex -Transducer complement: 3-way -Bass driver: 200mm Woven Kevlar Cone x 2 -Midrange driver: 130mm Woven Kevlar Cone -Treble driver: 25mm Soft Dome -Sensitivity(2.83V @ 1m): 89dB -Recommended amplifier power: 25-200W -Peak SPL: 110dB -Nominal impedance: 6O -Minimum impedance: 3.1O -Frequency response (+/-3dB): 35Hz - 20kHz -Bass extension (-6dB): 32Hz -Crossover frequency: 350Hz & 2.5kHz -Dimensions (HWD): 43.4" x 9.8" x 15.6" Available in Black, Walnut, Rosewood, and White - Sold in Pairs