Rockford Fosgate stiffening capacitors are designed to improve the overall performance of your amplifier by offering instantaneous current for greater bass transients and wider dynamics. The CPCD10 is built with the strictest tolerances for an ultra low ESR design. The CPCD10 comes with 24kt gold plated terminals, digital monitor and a charge/discharge resistor. Audible and visual warnings warn if the cap has been installed incorrectly.