Features: Type: Sealed-box, 2-way M-T-M array Crossover frequency: 2.5kHz Crossover type: Computer designed Butterworth 4th-order asymmetrical (time aligned) Linkwitz-Riely Recommended amplifier power: 10-150 watts RMS Magnetic shielding: yes Intended for use with a quality subwoofer Flush rear terminal cup and dual keyholes for wall-mounting capability Unique acoustic controls that allow the system to be calibrated or tuned Controls include a special high frequency contour switch which compensates for overly damped rooms or especially bright rooms Height includes tilt base Packaging: Carton Unit Of Measure Id: 1 * Width: 18.4 (inches)* Depth: 9.7 (inches)* Height: 8.4 (inches)* Weight: 17 (pounds)Color: Gloss Black Nominal Impedance: 8 Ohms Sensitivity: 90dB Frequency Response: 80Hz – 20kHz ±3dB Woofer: (2) 5 ¼” GLH Tweeter Size: (1) 1" Silk Dome Speaker Type: Center Channel