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This amplifier requires a charging system capable of at least 160 amps. Crunch's Power Drive Series PD 4000.4 Amplifier comes feature packed to control your audio. With a low pass filter, subsonic filter and bass boost you have plenty of options to tune and customize your car audio setup. The amp has preamp RCA outputs to daisy chain multiple amps together. The Power Drive Series also has 3-way protection circuitry to keep your amp safe from overheating, speaker overload and bad connections. Add a subwoofer to your setup with the PD 4000.4 amplifier and hear what's been missing in your music!