Power capacitors are an alternative to upgrading your existing power supply without the cost of upgrading your battery and alternator. The power capacitor will charge up and release its stored energy when low frequencies are played through your system. The digital display capacitor is an energy storage device, it is designed to supplement an audio amplifiers power supply during high current demand such as when music hits a low bass transient. The overall bass response of an audio system will be enhanced by using this device. It is capable of storing a large amount of energy which can be discharged very fast when needed. This makes the power cap a logical addition to the audio system as automotive batteries are not designed to deliver the current required in high power car audio installations.