Which battery is best for car sound?
The best car audio battery you can find is the XS Power D3400 12V High Output Battery. This power cell has the highest power output, so it will be able to run even the largest of car stereos.
How big of a battery do I need car audio?
Is it worth buying an AGM battery?
Many AGM batteries will last two to three times as long as their flooded counterparts, so from that perspective it seems to at least make sense. When you add in the safety benefits of an AGM battery on top of the performance benefits, AGM batteries make even more sense.