If I hooked up 2 amps would I need to buy a separate battery?

If I hooked up 2 amps would I need to buy a separate battery?

• Right now I have a 600 Watt Pioneer amp pushin 2 Knicker comp subs,Im getting another 600 Watt amp to make it 1200 watts, would I have to buy a little battery for them amps or would ...show more

• Answer:

  It really depends on whether your amps are 600 watts RMS each, or 600 watts max each. If they happen to be 600 watts RMS each, you'll want a second battery, unless you don't mind buying and installing alternators on a regular basis. But, since your subs can only handle 150 watts RMS each, you don't have a 600 watt RMS amplifier, you have a 2x150 watt RMS amp. That means that two will only be drawing around 44A of current. If you've got a small alternator (80A or less), you'll need a second battery, plus a battery isolator. If your alternator is 90A or larger, you'll be okay without a second battery, although you'll be replacing batteries about once a year, if you drive the car much. And capacitors only hold enough charge for a bass note or two. They won't allow you to sit at a stop light, with your headlights, brake lights, and air conditioner running, while you play your stereo at maximum volume. Only a second battery will allow you to do that.