PowerPlane 1.2 Specifications   Bandwidth (-3 dB): 75 Hz-20 kHz; Amplitude Response: 75 Hz-20 kHz +/-3 dB; Phase Response: Minimum ±10 degrees; Sensitivity: 89 dB@2.8 V-1m; Impedance: 4 ohms (3.0 ohms minimum); Recommended Power: 30-200 watts; Cabinet Dimensions: 15.25" W x 4" D x 9" H (horizontal orientation) Weight: 9 pounds ..