Bass Controller Adjustable Amplifier Subwoofer Controller Crossover Frequency Controller Regulator for Auto Car

You can adjust frequency. Just gently rotate button of the controller, and you can also control the sound with different frequencies, so that song sounds different, the heavy bass is deeping and it is very convenient to use. Installation is usually very simple, with detailed instructions, suitable for enthusiasts to modify, but also by professionals to install. Improve the bass of the sound system, so that car owners can enjoy a better music experience while driving and increase driving pleasure. Bass Controller Adjustable Amplifier Subwoofer Controller Crossover Frequency Controller Regulator for Auto Car. Features: You can adjust frequency. Just gently rotate button of the controller, and you can also control the sound with different frequencies, so that song sounds different, the heavy bass is deeping and it is very convenient to use. Installation is usually very simple, with detailed instructions, suitable for enthusiasts to modify, but also by professionals to install. Improve the