Pioneer SHF41LR 3-Way Bookshelf Loudspeakers (Discontinued by Manufacturer) Maximum Input Power - 160 Watts / Sensitivity - 84dB (the sound pressure level produced by the speaker) / Frequency Response - 40Hz - 20, 000Hz/ Impedance - 8 Ohms 8-inch (20cm) Large Cone Woofer for Dynamic Sound Reproduction / 4-inch (10cm) Cone Midrange / 1-inch (2.5cm) High-Efficiency Semi-Dome Tweeter Magnetically shielded so the magnets will not damage your TV when positioned next to it Dimensions (WxHxD) - 9-7/8 x 19-3/16 x 11-3/4 inches (251 x 504 x 299 mm) / Weight (each speaker) - 15 lbs 10 oz / 7.1 kg