New Battery, New Alternator?

Question

If i get a new battery, im not saying replacing the stock one, but to get a new one to put in my trunk for my subs, do i need another alternator?

Answer 1

If u can turn your car on and off 3 times easly without anything going battery is find,also how many rms are you running in the car,if your lights and dimming you can get a cap or a bigger battery.

Answer 2

depends on how much power you're drawing... But usually it's a good idea to get a bigger alternator...  -not necessarily 2 alternators (which would be difficult to setup too)

Answer 3

A dual battery setup with an isolator is the way to go if you plan on running stereo equipment with the car shut down. While installing a higher capacity alternator will help charge the batteries faster it isn't really needed.