Quote Originally Posted by BanginJimmy
Go back and read my post. Upgraded battery and alt are steps 2 and 3. Step 1 should ALWAYS be a big 3 upgrade.


If you dont know what the Big 3 are.

1. Alternator to battery Pos wire.
2. Battery to engine frame ground
3. Block to frame ground.

until those 3 are upgraded you will only see minimal gains from an upgraded battery as your alt will not be any more efficient.
I know what big 3 is. It all goes hand in hand though. If the system is working correctly in the first place then even with a 50-60 amp draw from an aftermarket stereo system the big 3 alone will do ALMOST nothing. Notice I didn't say it will do nothing. What it will do is allow more current which in turn will just put more strain on a stock battery and alternator. You WILL eventually wear out a stock alternator. A deep cycle battery will hold a charge better therefore put less strain on the alternator when the stereo system is drawing more than the alternator can put out.