The chemical action in a battery has a small delay which a capacitor will supply very high current during the time of this delay. Hlabs capacitors have very low internal series resistance (ESR) which means very high surge current -up to 10,000 amps. The smaller filter caps inside your amplifier will run cooler so your amplifier will last longer. Hlab caps also help eliminate engine noise that is fed from your main power wire from the alternator that is not filtered by your battery.

Model  :  900015SD-USA
Size  :  3" X  11 ¼"
Weight : 3 Lbs
Capacitance : 1.5 Farads
ESR : 0.002 ohms
Operating Voltage :  20 Volts max
Operating Temperature  :  95º C
Choice of clear or smoked display housing

Model  :  Two 900010W short
              One 900010WM short
Size  :  3" X 6¼ per cap
Weight : 2 Lbs per cap
Capacitance : Total 3 Farads
ESR : 0.0008 ohms
Operating Voltage :  20 Volts max
Operating Temperature  :  95º C