A car audio equalizer gives you precise tone control and can fine-tune a high-end system. Improve your system by eliminating noises from unwanted sounds from your car or road with the Power Acoustik PWM 19 Car Audio Amplifier Equalizer. Featuring 2 selectable inputs so you can connect to your aftermarket system and 4 variable frequency bands with a ± 12dB parametric equalizer range this equalizer will be just what you need. Optimal control provided with rotary input gain control subwoofer gain control and front to rear fade control. Selectable input between CD and radio adds optimal versatility and the equalizer features convenient selectable two-color illumination. An isolated PWM (Pulse Width Modulated) power supply adjusts the duty cycle to regulate the output voltage. Improve your car audio and get the most out of your sound with the Power Acoustik PWM 19 Car Audio Amplifier Equalizer.