Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Caps are kind of like a shock absorber on your suspension smoothing out your ride. When your electrical system can't keep up, it will help smooth out the power delivery. They are not a replacement for nicer batteries and power wires and good grounding.
FYI, I am running three amplifiers in my stock charging system and have zero headlight flickering. I have a big 3 upgrade and a nice AGM battery.
Whats the big 3 upgrade?
Good ground can work wonders. I run a soundQubed amp that at 1 ohm runs a steady 1150 ish watts and around 1600 when bass hits(is what amp dyno showed) powering 2 kappa 1200w subs(12 inch) and have the stock alpine amp running interior and no electrical upgrades and even turned up to clipping I get very little light surge. Also running 2ga pos and 1ga for ground.