Connecting the amp to the car battery is very important. It’s a little different when we connect the amplifier with the battery.

Car sound systems can sound amazing, and if you’re unhappy with how it sounds, it might be time to connect an amplifier and connect it to the battery.

How to connect amp to car battery? *Well, we are going to discuss the topic in detail. In order to connect an amplifier to car battery, follow the steps below:

  1. Spot the type of battery that you have in the car.
  2. Recognize amp’s type plugged in the car.
  3. Attach the positive terminal of the battery with the positive terminal of the amp.
  4. Ground amplifier’s negative terminal.
  5. Asses the connection to confirm if it’s secure.

Let us discuss some of the issues and misunderstandings encompassing the subject:


If you connect the amplifier to the battery, you have to add an in-line fuse. If there is a fire, this is to be used. You need to connect the ground wire to a clean metal surface on the frame of the car.

It is recommended to ground the amplifier directly to the battery. The reason for this is the safety in case the ground strap from the battery to the body is cut.

You can use the amplifier if you do not want to use the battery as the power source. This way dependency on the battery is prevented and the car battery should last a long time.

If you want to use the battery, you must check that the battery is good. It must be checked by a professional if it has been sitting for a long time.


Here are a few main types of batteries used in cars:

  1. Lead-acid
  2. Lithium-ion
  3. AGM

Lead-acid batteries :

Most of your batteries will be in your car, so you need to know which battery to buy. These batteries have removable caps, so you can add water to them if needed.

The best way to mount the amp is to get the most bang for your buck by placing it as close to the battery as possible. With this, you’ll reduce the amount of current flow in the circuit and thereby cut down the loss in voltage between the battery.

Lithium-ion batteries :

When it comes to lithium-ion batteries, the technology has been available for over 10 years. But it wasn’t until 2010 that companies started making commercial products out of it.

The main obstacle has cost. In fact, the cost of lithium-ion batteries is now so low that they’ve become the primary battery of choice for many devices that need to last for a long time without being recharged.

So while the technology has been around for years, it’s only recently become affordable for consumers.

AGM batteries:

Battery life has always been a major concern for consumers looking to buy batteries. Many people simply don’t realize how quickly the battery in their phone dies and how important that is for your smartphone to be able to last all day long.

While we don’t want to scare you away from buying batteries, there are ways to extend your current batteries’ lives. One way to do this is to switch to “AGM” batteries. These are designed to last longer than the old NiMH batteries and can be found for a lower cost.

For more about car batteries please click here!



Let’s look at how to run the power wire from the battery to the amplifier after we know the size of the power wire. The power wire should not rub against the metal and cause a short. The wire needs to be connected to the battery.

You can either use terminal strips or screw them into the power terminal. You need to connect the ground wire once the power wire is connected.

You should connect the ground wire to the car. It is an excellent place to connect the ground wire. Sand away paint and there is a good connection between metal and wire.

One thing to remember when running a power wire is to keep it away from other cables. The head unit has cables that connect it to the amplifier.

The audio signal can be interfered with if the power wire and cables are close together. The power wire should be on one side of the car. You can protect the power wire with a wire loom. There is a wire loom at most stores.


Fuses are always a good idea. You should always use one between the amplifier and battery. You should place the fuse as close to the battery as possible.

This will help prevent your cable or wires from getting too hot and burning out if there is a short circuit. The size of the fuse will depend on the size of the power wire, the amps, and the amount of current.



Copper and aluminum are the most common metals used in the wiring that connects audio equipment together. Aluminum is an affordable choice when it comes to copper wiring. Copper is more expensive and heavier than aluminum, but it is better at conducting electricity than aluminum.

Most applications require copper wiring. A more expensive model will give you better performance. An added measure to keep in mind when choosing a power supply is shielding. In both cases, you need to pay close attention to where you’re placing each hair strand.

It doesn’t matter which type of shielding you choose, as both types will work well. Running cable in a tight space, especially with a round cross-section, can be difficult.

A gauge measures the thickness of the wire and is an essential tool for any home electrician. Thick wires are better than thin wires for electrical current. If you have the space for it, it makes sense to try to use the thickest wire.


Most amplifiers have a maximum power rating. And the length of wire you’ll need to run from the power supply depends on how much power the amplifier is capable of handling.

Determining the power requirements of your amplifier is easy. First, take the rating of your amplifier in watts and divide it by the voltage of your car battery. If you’re in the market for an amplifier, the Draw will tell you the current draw of your equipment.

For example, if your amp is rated for 1,000 watts RMS at 14 volts, then you need to take 1,000 watts and divide it by 14 volts, you’ll need a wire that can handle 71.4 amps, so look for it on a power outlet labeled with amp markings.

At Aic-Controls, a wire is marked in amp-turns by the American Wire Gauge (AWG) chart. The thicker the wire, the more current it can tolerate.



Ground connections are necessary for the amplifier to work. The amplifier will not work without it. The ground wire allows the electricity to flow safely from the outlet back to the battery.


The best place to ground your amplifier is to connect it to the negative (–) terminal of the battery. A good ground connection is important because it ensures an amplifier has a good path for the electrical current to flow.

It helps to reduce the sound of noise in the system and make the amplifier sound better.


The ground wire is not the most frequently used solution for connecting the ground lead to the power outlet’s ground terminal. The negative terminal in an electric car is where the electric charge flows back to the battery.

Whether you connect the ground wire to the positive or negative terminal depends on the wiring situation in your particular location. To get good ground, you need the ground wire to be the same length as a power wire.

This will slightly increase the amplifier installation cost.


So here we have almost covered the topic, how to connect amp to car battery? The best way to ensure your amplifier is getting the power it needs is to connect it directly to the battery. Connecting an amplifier to the battery is explained in 5 easy steps.

Grounding is the best way to reduce noise in the system. If you’re installing a new car amplifier, you want to make sure to use the correct size power wire.


1. Why Am I Not Getting Power to My Amp?

When making sure that the connections on your circuit board are secure, make sure to check them all. If you have any loose or exposed pins on the connector, it could cause a short circuit and burn out your circuit.

Also, check the fuse to make sure it’s not blown. If the fuse is blown, it means that there is too much current flowing through the wire, and in most cases, you’ll need to use a thicker

2. Can I Connect Multiple Amps to One Battery?

You can connect multiple amplifiers to one battery, but you must use a separate charging cable for each.

Make sure that the total current draw of all the amplifiers doesn’t exceed the maximum ratings on the wires and that you

3. Does the Remote Wire Power the Amp?

The remote wire does not power the amplifier. If you connect this to the amplifier, it will turn on and off your amplifier.

4. Can you wire an amp directly to the battery?

If you do ground directly to the battery, I would recommend fusing your ground wire. The ground strap that connects the battery to the body is critical to keep everything grounded and protected.

In the event that the connection to the body is severed or becomes loose, this is where the current flows to.

5. Will amp turn on without ground?

An amplifier that doesn’t turn on could be caused by bad ground. Not connecting a 12v+ power supply to an amp would too, prevent an amp from turning on.

A failed connection from a wire will stop an amplifier from turning on. Just a personal note: take the battery off of the device before it’s installed.

6. Where does the ground wire go on an amp?

To get the most reliable connection, it’s best to attach the ground wire directly to the metal chassis of your vehicle. You might need to find a few ground screws or bolts and a factory grounding point. The chassis itself has to be drilled.

7. Why are amplifiers not grounded?

Most consumer electronics, including audio equipment, are “double insulated” or Class II. It requires no ground wire for safety. A ground loop is a big problem with audio, so don’t run a ground wire if you want to use audio gear.