Adding an equalizer (EQ) will give your sound system ultra-precise tone control, allowing you to fine-tune those exact frequencies. A quality EQ will make the difference by catering to your listening preferences and allowing you to restore great sound that gets disrupted by your sound system’s worst enemy—the car itself. You can use an equalizer to remedy various tribulations such as: vehicle and road noise, size and shape of your car’s interior, the reflectivity of glass, and the absorbent nature of seats. You’ll easily be able to boost frequencies you’re missing, and attenuate the ones your speakers exaggerate.