The HV121-II is a 12” ported, design that delivers high performance from its single 12” mineral-filled Poly woofer. A full featured 150W integrated amp provides clean and controlled power.Impedance: 4 ohmsFrequency Response (1): 22 Hz - 250 HzCrossover Frequency: 50 Hz – 250 Hz Variable; 24 dB/Octave + LFE SettingLow Pass Crossover: 50 Hz – 250 Hz Variable; 24 dB/Octave + LFE SettingAmp Power: 150 WattsColors: Black TexturedHeight: 425.5 mm / 16.75"Diameter (Width): 400.1 mm / 15.75"SM Depth (Including Bracket): 419.1 mm / 16.5"Weight: 10.91 kg / 24 lbRegulatory - RoHS: approved