AMP wiring (RCA to battery)?
ok just about to install my amp and umm it says i need a ground wire from the battery to the chasis,,so do i have to do that??? or iz the battery already grounded when its stock in the car??? if i have to do it what wire do i use..............AND second question is do i have to have another battery terminal on my battery,,,id say its a single post for (-) and same with (+)
and theres only one wire coming off the both,,,can i hook the RCA cable striaght up to the battery with the other cable running off it aswell,,,or do i need a gold plated battery terminal??if so it has to be (+) right????
IF u understand that question hahahaha plz help
sorry i ment my 4 guage wires to power the battery,,,,,,,do i need a battery terminal for that,,or cAN i just hook it up straight to battery,,and on instructions says negative battery teerminal has to be grounded,, mine aint???
You will need to...
Run a power wire of the correct guage from the battery with a fuse no more than 18" from the battery to the amp. The fuse should be a total of the fuse rating on the amp.
If you don't have an aftermarket stereo, run a fused (1 amp) wire from the ignition ACC to another switch to the REM (remote) connection on the amp. This allows for full control and you never have to worry about forgetting to turn off the amp. The switch is so you can turn off the amp at will so as not to give grandma a heart attack in the car.
If you do have an aftermarket stereo, connect the blue remote turn -on form the HU to the REM connection on the amp.
The ground should be the same size as the power wire and securely grounded to the chassis of the car.
You can use a "line level converter" tapped from the speaker out of the head unit if you don't have an after market HU. If you do, run RCA from the output to the back to the amp.
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 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 mimimum average current required to power the audio system and vehicle. I would recommend going with the next highest rated alternator you can find.
If the number you come up with is the same as what your alternator supplies, you need to take no action.
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