Polk Audio Signature Elite ES90 Height Module Speakers (Brown, Pair) 2-Way Speaker Design, 1" Terylene Dome Tweeter, 5.25" Mica-Fortified PP Midrange Woofer, 20 to 150W Recommended Amplifier Power, Frequency Limit: 52 Hz to 40 kHz, -10 dB, 4-Ohm...