will using a high-watt amp drain your battery. 350 watt amp compared to 1000 watt.?
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Question by Blahblah_bbbllaah: will using a high-watt amp drain your battery. 350 watt amp compared to 1000 watt.?
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Answer by Silverstang
Yep
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Yes more wattage drains the battery faster.
October 30th, 2012 at 1:32 pmIt will drain your battery faster, but will your charging system be able to keep up is the real question. That 1000 watt amp at full knock could draw 80 amps–the 350 only 30. If you’re on a slim budget, stay with a smaller amp.
October 30th, 2012 at 1:46 pmyes it will drain it faster but it will also mess up your alternator.
October 30th, 2012 at 2:29 pmin order for it to not drain your battery near as fast and not mess up your alternator, you probably need to get a power cap. definatley when working with a 1000 watt amp
Get a capacitor. 1/2 farad for every 500 watts. Although some of the new amplifiers like the Kenwoods have less stress on the electrical system but you will still need a cap. A good indicator is the ol’ headlights dimming when the bass hits.
October 30th, 2012 at 2:33 pmSomething to concider…this is an example…
To calculate the current draw of an amplifier, multiply the number of channels by the RMS watts per channel (a 2 channel amp rated at 2000 watts RMS per channel would be 4000 watts). Double it to account for amplifier inefficiency (4000 watts X 2 = 8000 watts), then divide by the average output voltage of an alternator, 13.8 volts (8000 divided by 13.8 = 579 amps). Since the average music signal requires about 1/3rd of the average power in a test tone, divide by 3 (579 amps divided by 3 = 193 amps).
This is an average approximation of current draw and can go higher. So I would gather between 194 and 289 amperes for this system.
The alternator of a:
compact car is about 35 amps
mid-sized car is about 65-75 amps
SUV is about 145 amps
Calculate 40% of the amperes of the alternator you have now. This is the average current the car uses when running. Add this number to the approximate average current draw of the amps, and you will come up with the actual size of alternator you need.
If the number you come up with is the same as what your alternator supplies, you need to take no action.
October 30th, 2012 at 3:08 pm