Feature:1. Adjustable: The car sound equalizer features 7 equalization bands (63Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, and 12kHz) that are adjustable from 12 to and 12db. Subwoofer frequency adjustable from 43Hz to 120Hz, 60 to 200Hz.2. Powerful: Enhance your in car sound experience with 6 channel front, rear, and subwoofer auxiliary stereo outputs. This ensures that your amplifier and speakers receive a strong but clear signal.3. CD And AUX Inputs: Allows for CD and Aux (2 channel) inputs with a gain knob to adjust the AUX volume, and CD and AUX input buttons for flexible switching to another mode input.4. Multi Function Controls: This 7 band equalizer offers flexible controls including subwoofer volume control, subwoofer frequency control, fader control, and various Hz controls.5. Professional Design: The car amplifier graphic equalizer is powered by a DC 12V supply. In addition, the rugged metal chassis and premium knobs for all controls enhance your experience.Specification:Item Type: Sound EqualizerMaterial: MetalEqualizer Bands: 63Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, and 12kHzSubwoofer Frequency: 43-120Hz, 60-200HzInput Impedance: 10K OHMSSNR: 90dBTotal Harmonic Distortion: 0.05 percent Channel Separation: 70dBFrequency Response: 10Hz-50kHz.Package List:1 xSound Equalizer2 x Iron Pieces4 x Screws1 x User Manual