Polk Audio Signature Elite ES10 Surround Speakers (Walnut, Pair) 20 to 100W Recommended Amplifier Power, 2-Way Speaker Design, 4" Mica-Reinforced Polypropylene Woofer, 1" Terylene High-Res Dome Tweeter, 75 Hz to 40 kHz Frequency Response, 87 dB...