3 Selectable Bass Modes - Deep, Natural, Dynamic 170W MAX / 50W RMS Brand-new Remote Controller CLASS-D Amplifier with DSP Highly Compact and Space Saving Design High Rigidity Body to Reduce Distortion Optimized for Electric Vehicles GRADE Active Size 20 cm (8") Maximum Music Power170 W RMS50 W Frequency Response DEEP: 20 Hz to 200 Hz DYNAMIC: 40 Hz to 160 Hz NATURAL: 40 Hz to 200 Hz Sensitivity (1W / 1m) DEEP: 95 dB DYNAMIC: 100 dB NATURAL: 98 dB Impedance Single 1Ω