More on Amazon.com : http://www.amazon.com/gp/product/B001BY8WPE?tag=purrfectcatdi-20 <br /> <br />Energy RC-70 Tower Speaker - Black (Each) <br /> <br />Speaker System - Bass Reflex Rear Vented <br />Recommended Amplifier Power - up to 250 watts RMS <br />Impedance - 8 ohms nominal <br />Minimum Impedance - 4 ohm <br />Frequency response - 31Hz-23000Hz - 3dB
