[9 Bands]: The car audio equalizer features 9 equalization bands (50Hz, 100Hz, 250Hz, 500Hz, 1KHz, 2KHz, 4KHz, 8KHz, 16KHz), intelligent noise reduction, precise adjustment, and adjustable subwoofer frequency from 30Hz to 120Hz. [6 Channel Outputs]: This 9-band equalizer supports front left and right channels, rear left and right channels, and 2 subwoofer output channels. Independent subwoofer output and adjustment enhance in-car audio performance. [2 Channel Inputs]: The car audio equalizer supports CD and Aux inputs, with a gain knob to adjust Aux volume, delivering improved sound quality. [Durable Material]: The equalizer features a high-quality metal housing, powered by DC 12V, offering a premium feel, easy operation, and long service life. [Easy Installation]: Suitable for cars, boats, RVs, and other stereo systems, this audio equalizer is easy to install. Built-in DSP chip reduces howling interference, prevents noise, and delivers clear, high-fidelity sound. Power supply: 12V DC Maximum output voltage: 8V RMS Equalization range: 12dB Subwoofer frequency: 30Hz–120Hz Color: Black Material: Metal + plastic Package Contents: 1 x Car Audio Equalizer Note: Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.