My amp shuts off for no reason?!?

[Nick]

I have 1 15, and a 1500rms Hifonics amp , I have the stock battery made for the car but recently I will turn my car on turn on my system and the green light to the bass knob will flicker and so will the illuminated "H" on the amp .do I need a bigger battery ? Cause I have a cap but I stopped using lol thanks!

 

[Charles]

yes you need the big 3 upgrade look for 12volt .com they have a web page that tells you just what to do to upgrade your charging system.the amp is not getting enough power to run the sub woofer,and get the capacitor back in service once you get the upgrade done with out the upgrade your just pushing your charging system to its limits.and u tube has many how to videos from kicker or rockford fosgate.take a look.hope this helps.