2007-01-11 03:41:52 · 6 answers · asked by cryingknights 1 in Cars & Transportation ➔ Car Audio
They make kits for it. Go to the autoparts store and ask for a dual battery kit. This will include some safety items, too, so don't leave anything out. An RV shop will have these, also.
2007-01-11 03:46:18 · answer #1 · answered by J.R. 6 · 0⤊ 0⤋
Just be aware any additional batteries you put in will tax the alternator for power that could otherwise be used for the amp and can be fixed with a HO alternator.
A second battery would only be benificial if you plan on running your system with the vehicle off.
Something to consider...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 500 watts RMS per channel would be 1000 watts). Double it to account for amplifier inefficiency (1000 watts X 2 = 2000 watts), then divide by the average output voltage of an alternator, 13.8 volts (2000 divided by 13.8 = 145 amps). Since the average music signal requires about 1/3rd of the average power in a test tone, divide by 3 (145 amps divided by 3 = 48 amps).
This is an average approximation of current draw and it can go higher. So I would gather between *48 and 72 amperes for this example.
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 (*48) of the amps you calculate, and you will come up with the mimimum average current required to power the audio system and vehicle.
If the number you come up with is the same as what your alternator supplies, you need to take no action, otherwise go with the next highest ampere output you can find.
2007-01-11 04:05:01 · answer #2 · answered by Anonymous · 1⤊ 0⤋
ok best answer here and alot cheaper! your obviosly having trouble with amperage in your car right? "head lights dim ect." try these first... get rid of the 14 16 or 18 guage power wire your using.. would you stuff a golf ball through a coffee straw? get at least 4 guage preferable 2 guage and connect it using the right terminal on your battery " 2 connections" then on your ground wire make it as short as possible no more that 1.5 foot this will keep the amps steady as the amp will not have to work to find ground signal. then if that does not work go to parts store and ask for a new allternator make sure it is high output. ask for high output alternator. that shold do the trick you might go buy a 1 farad cappacitor too. www.myspace.com/jimmycody
2007-01-11 04:36:11 · answer #3 · answered by www.myspace.com/jimmycody 2 · 0⤊ 2⤋
Use a dual battery isolator, however the extra battery will put a strain on your charging system, ie your alt. Good luck
2007-01-11 04:05:45 · answer #4 · answered by Bmc420 3 · 0⤊ 0⤋
You need a battery isolator. Go to any auto parts chain and tell them what you want to do, they'll hook you up.
2007-01-11 03:47:30 · answer #5 · answered by Anonymous · 0⤊ 0⤋
you wouldnt want to do that,, having a battery seperate from the main system will not allow it to charge from the main system,, if you need more juice,, get a bigger alternator first off,, and then try adding a capacitor to you audio system
2007-01-11 05:28:26 · answer #6 · answered by brak_the_hun 3 · 0⤊ 0⤋