SOLD AS A PAIR...2-way 5-1/4in Bookshelf Speakers Frequency Range On Axis @ 0¡ ±3dB 65-21,000 Hz Off Axis @ 30¡ ±1.5dB 65-10,000 Hz Lf Cutoff -10dB 55Hz Sensitivity 1w (2.83V) @ 1m, IEC-filtered Pink Noise, C-weighted Anechoic Chamber 89 dB Typical Listening Room 91 dB Impedence Nominal 6 Ohms Minimum 4 Ohms Input Power RMS, Clipping < 10% of the Time Recommended 15-80 Watts Program 60 Watts Acoustic Design Tweeter (Nominal) 3/4" (19 mm) Aluminum Dome with Ferrofluid Woofer (Nominal) 5 1/4" (130 mm) Injection Molded Metalized Polypropylene Cone Damped Rubber Surround Crossover 3,000 Hz, B3 Internal Volume Design Type 0.29 cu ft (8.0 liter) Bass reflex 1 1/2" Rear Port Video Shielded Size (W x H x D) Millimeters 179 x 300 x 245 mm Inches 7 1/16 x 11 7/8 x 9 5/8" Net Weight Kilograms 4.0 kg/each Pounds 8.8 lb /each Shipping Weight Kilograms 9.7 kg/each Pounds 21.4 lb /each Finish Black Ash, Maple or Sienna Features 5-way Gold-plated Binding Posts Keyhole Slot 1/4-20 Threaded Brass Insert Aluminum Grille Clear Rubber Bumpers