i bought a Lightning Audio wiring kit which said it was good up to 350 watts.
I had an original intention on finding a 350 watt amp, but i got a good deal on the 400.
Also, i replaced the battery last year, so i know thats fine.
I also put in the sub the same day i reinstalled my alternator when putting my JRSC in, but my alternator never acted up before from this.
I had two pioneer 10's running in a ported box before from this amp and it didnt seem to make my lights dim, but i only had it for a week or so, so i might have not really had enough time to drive around at night to realize if this was happening from that.
Instead of pushing two weaker tens in a louder box on less wattage, im pushing on stronger 10 in a sealed box now, with more wattage, because my amp was 175 watts x 2 channels, or 400 x 1 channel, so now im pushing it harder. Since im pushing it harder, that must be whats causing the light dim.