Yes I did the install myself the amp and subs are matched for power with 3 40amp fuses in the amplifier the amp itself is rated at 1000Watts RMS, the ground for the amplifier is through a double layer floor seam that had a wire wheel scratch the painted surface to get bare metal. I also upgraded the body ground from the battery under the hood factory was only 12GA if that it is now 4GA. The lights don't start flickering until I use the remote gain control on the amp. There are a couple of pictures to look at on my public profile to see what the amp and subs are along with the box etc. I will get around to taking newer pictures to show the battery that is back there now sooner or later.How is your amp? Do the speakers over power them? If your lights are flickering I would say there is an issue were the amp/speakers are drawing too much power from the battery. It could possible be it is not grounded correctly. Did you do the install yourself?