4-Band EQ Control | Fine-tune bass, mid-bass, midrange & treble for perfect in-car sound balance. Powerful 8V Line Driver | Boosts audio signal strength for cleaner, distortion-free playback. Independent Subwoofer Control | Adjust sub-levels directly from the dash for deep, precise bass. Easy to install. Long Lasting | The Massive Audio EQ4 Car Audio Equalizer is easy to install and produces amazing results for years! Universal In-Dash Design | Easy installation and seamless integration with most car audio systems. Enhance your car audio system with the Massive Audio EQ4 4-Band Equalizer. Designed for audiophiles, it delivers precision control over bass, midrange, and treble frequencies. Featuring an 8V line driver, adjustable subwoofer level, and fader controls, the EQ4 ensures clear, distortion-free sound. Compact, durable, and easy to install - perfect for achieving professional-level audio tuning in any vehicle setup.