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 + 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 Equalizer Material: Metal Equalizer Bands: 63Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, and 12kHz Subwoofer Frequency: 43-120Hz, 60-200Hz Input Impedance: 10K OHMS SNR: 90dB Total Harmonic Distortion: 0.05% Channel Separation: 70dB Frequency Response: 10Hz-50kHz. Package List: 1 x Sound Equalizer2 x Iron Pieces 4 x Screws 1 x User Manual