NHT VT-2 Audio/Video Tower Speaker (Left/Single) (Discontinued by Manufacturer) 10-inch subwoofer, two 5.25-inch midranges 1-inch fluid-cooled soft-dome tweeter Upper drivers are video shielded 25 Hz to 21 Khz +/- 3 dB, 6 ohms nominal Suggested amplifier power of 50 to 250 watts per channel