i want to power my amp through a separate battery, how can this be done?

Question

my amp is a sherwood, bridged sending 250w to a 12" pioneer.
the car is a 91 buick skylark 4 door.

Answer 1

Why do you want to connect a second battery?????
Do you need more power for your system? If so, what you need is a high output alternator, do the Big 3 upgrade.
The battery in the car is used to supply power to the vehicle only when the engine is OFF. Once you turn ON the engine the power supplier is switch to the alternator. Now is the alternator who supply your vehicle with electricity including your amps and all of it. Every time you add a device that consumes power, it cause a drop in voltage. If you add a second battery, the alt. will have to supply current to the car's engine battery, all of your vehicle electrical system , your audio system, AND THE SECOND BATTERY. So if you add this battery you will have even less power to the system. The alternator uses about 60% of the current to the car, the remaining 40% is what you have for extras. When the alt. is overcharged it will began to start pulling those extra needed amperes from the battery, thus preventing it from charge again. In time your alternator will fail if you installed the second battery, the best thins to do is the BIG 3.
1. replace alt. with a high output alt.
2. replace power wiring with 4 gauge
3. replace the cars battery and alternator, with a wire
size1/0 gauge , including the grounds and very important of the chassis and the engine block.

Answer 2

Running a second battery is never a good idea as it's just an added strain on the alternator.

If your total system power is more than 1000 watts RMS you will need to:

1. Upgrade the alternator to a high output alternator
2. Upgrade to a heavy duty deep cycle battery
3. Upgrade the "Big 3" - that is to replace the power wire between the battery and alternator, the ground from the battery to the chassis and the ground strap from the engine/tranny to the chassis with at least 1/0 AWG wire.

Failure to do this will result in you replacing them anyway as the alternator will eventually fail.

Here is a guide that will calculate what size alternator and power wires you need http://www.datafilehost.com/download.php?file=6d26c621

You'll need Microsft Excel to use it.

See my site for more info http://spkrbox1.spaces.live.com

Answer 3

As in take it out and run it on a table? Solder battery clips on the red and black wires, include the yellow and any other applicable hot wires, power ant not needed though. I have run amps on batteries hooked up to 110 volt pluged into the wall receivers with no bad effects, it worked fine for years.

Answer 4

Wire your batteries in a parallel series circuit with a selective switch to charge either the batteries separately for the car or both for the car and amp.

Answer 5

you will be able to desire to place a battery that could desire to power the motor vehicle and a distinctive one for the different stuff yet room is a concern. in case you charge up one battery and use it for the different stuff then disconnect it from the ability if the ability is mandatory for the motor vehicle. in case you purchased one or 2 lithium motorcycle batteries then possibly positioned them or it in the interior. purely use the battery power by myself mutually as the motor vehicle is working in case you do no longer or can no longer get a bigger alternator.

Answer 6

You'll need another battery, and on/off switch and a battery isolator, this isolator will allow the second battery to charge but not drain the primary battery. Then add some wire and hook it up. good luck