TJB
Junior Member
Quick question. I have 2 12 inch obsidian subs (600 rms) and an 1800 watt amp. My cars electrical is stock, but I plan on upgrading. I will buy an agm batt, but I want to know if I need my original battery and the agm or just replace the original with the agm. I also plan on doing the "big 3". thanks! P.S Im a noob