[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 range from 30Hz to 120Hz. [6 Channel Outputs]: This 9-band equalizer supports front left/right channels, rear left/right channels, and two subwoofer output channels. Independent subwoofer output and adjustment enhance in-car sound performance. [2 Channel Inputs]: The car audio equalizer supports CD and Aux inputs, with a gain knob for Aux volume adjustment to improve sound quality. [Durable Material]: The equalizer features a high-quality metal enclosure, 12V DC power supply, premium build quality, intuitive controls, and long service life. [Easy Installation]: Suitable for cars, boats, RVs, and other stereo systems. Built-in DSP chip reduces howling interference, minimizes noise, and delivers clear, high-fidelity sound. Power supply: 12V DC Maximum output voltage: 8V RMS Leveling range: ±12dB Subwoofer frequency range: 30Hz–120Hz Color: Black Material: Metal + Plastic Package Contents: 1 x Car Audio Equalizer Note: Color may vary slightly due to lighting and display differences. Measurement tolerance: ±1–3cm.