[SPECIFICATIONS]Frequency Response:20Hz - 150Hz ,Low Pass Filter:50Hz - 150Hz,Bass Boost:0 to +18dB,Subsonic Filter:20Hz,Signal-to-Noise Ratio:>90dB,Impedence:3 Ohm.Dimension:11.42 x 8.47 x 2.56(L x W x H)inches. [ENCLOSURE]Aluminum alloy case, to create super cooling performance,Easily to install at only 2.56" tall so it can fit anywhere. [BUILT-IN AMPLIFIER]Built-in RMS 120W Class AB power amplifier,Unleash the power of music and bring a strong stage bass effect to the car. [MULTI-PROTECTION CIRCUIT DESIGN]Thermal protection ,Shor-circuil protection,Under-voltage protection,Over-voltage protection ,Reverse connection protection. [RMS POWER] 600 watts of peak power and 120 watts RMS .This model you can be 100% sure that this item will produce the power it says it will . Not like fooled by other brands who write bogus power ratings . It has level control for the volume and subsonic filter to filter out this really low frequenceies that human ear can not hear . CB08 with low pass crossover filter,phase control,input sensitivity and bass boost.