What a Car Capacitator Is and When to Use One | Stinger First of all, why would I need a capacitor for my car? High wattage car stereo amplifiers soak up large amounts of current from your car’s electrical system. In many cases, when loud bass sounds play, your car’s electrical system can’t supply the current fast enough so this causes the voltage to drop. What's the Best Car Audio Capacitor? - StereoChamp Apr 20, 2016Some people believe that car audio capacitors can also improve car audio system’s low end response and overall sound quality. That’s not true. The main purpose of using a car audio capacitor is to support the amplifier by feeding it the power it needs for short bursts. And thereby, prevents the sound from deteriorating due to under-voltage.
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