How To Wire A 4 Channel Amp To 6 Speakers – The Easy Way

If you want to increase your car audio system’s performance, you may wonder how to connect a 4 channel amp to 6 speakers. Not only do you have to worry about the wiring, but you also make sure that your amp is powerful enough to handle 6 speakers. If you get it wrong, you could damage your equipment or, even worse, yourself.

There are two ways to wire: Series wiring and parallel wiring. It’s not as difficult as it may seem – with the right tools and a little know-how, you can have your system up and running in no time.

This article will show two methods for wiring a four-channel amp to six speakers. We’ll also explain how to avoid overheating and protect your equipment. Let’s get started!

Can Your 4-Channel Amp Handle 6 Speakers?

When connecting a 4-channel amp to 6 speakers, you will need to consider the amplifier’s wattage and impedance of the audio system. For the amplifier to be able to handle the load, you will need to make sure that the total impedance of all of the sound systems combined is not more than the impedance of the amplifier.

Impedance is a measure of opposition to current flow in an AC circuit. It is measured in ohms. In other words, the impedance of a speaker is a measure of how much resistance it offers to the flow of electrical current. The higher the impedance, the more current is required to achieve a given power level.

Loudspeakers have an impedance rating of 4 or 8 ohms for most home stereo systems. Some amplifiers are designed to drive 2-ohm loads; others can handle 4-ohm loads without difficulty. Many car audio amplifying devices are designed to operate with speakers with 2 or 4 ohms impedances.

How to wire a 4 channel amp to 6 speakers - Loudspeakers

It would be best if you matched the impedance of the amplifier and speakers for the amplifier to work properly. If the impedances are not matched, the amplifying device will send an incorrect signal to the sound system, which could damage them.

When wiring your amplifier to multiple speakers, it is important to measure the impedance of each speaker to ensure that the amplifier can handle the load.

When wiring multiple speakers in series, the impedance of all audio systems is added together. For example, if you have two 8 ohm speakers wired in series, the total impedance would be 16 ohms.

If you are wiring more than one audio system in parallel, it’s important that all of the speakers have an equal impedance rating. For example, if I had two 8 ohm speakers wired together, my total measured would be 4 Ohms.

However, if all speakers have different impedances, the total impedance is calculated by the formula: 1/(1/impedance 1 + 1/impedance 2 + 1/impedance 3, etc.). For example, if you have one 8 ohm speaker and one 4 ohm speaker wired in parallel, the total impedance would be 2.67 ohms.

It is important to ensure that your amplifying device can handle the total impedance of all audio systems before connecting them together.

How To Wire A 4 Channel Amp To 6 Speakers

When you want to amplify your car sound system by wiring in more speakers than the amplifier can support, it’s important to know how to do it safely. You can add up to six speakers to a four-channel amp using a few simple techniques without damaging the equipment or risking your safety.

Series Wiring

You are creating one large amplifier when wiring a 4-channel amplifier to 6 speakers in a series. It can be advantageous because it is often easier to wire and can be safer. However, the sound quality will not be as good as when wired in parallel.

Wiring a 4-Channel Amp

How to connect a 4 channel amp to 6 speakers in a series way? Follow these steps:

Step 1: To connect two speakers in series, start by connecting one speaker’s negative terminal to the amp output and then wire them together. Next, go ahead and do what you did, but with another wire from your second speaker’s positive connection onto that channel, there are now 2 wires running—this will create a circuit for maximum sound.

Step 2: Connect 2 other speakers to 1 other amplifier channel in series (do the same steps above).

Step 3: Connect the last 2 speakers to the last 2 channels of the amplifier like normal. Just wire the negative terminal of each channel to one negative terminal on each, then wire the positive terminal of each channel to one positive terminal on each loudspeaker.

Parallel Wiring

You are providing the best sound quality possible when connecting a 4-channel amplìier to 6 speakers in parallel. However, this setup can easily overload, damaging both the speakers and the amp. It is because the amplifying device is divided between all speakers, and each receives more power from the battery vs. capacitor car audio.

Wiring in parallel ensures that each speaker will get the same power, which is important when trying to achieve optimal sound quality.

Step 1: You will need to connect 2 speakers to 1 channel of the amplifier and 2 speakers to another channel of the amplifier.

Make sure to connect the first speaker’s negative terminals to the second speaker’s negative terminals and the first speaker’s positive terminals to the second speaker’s positive terminals.

Once you have done this, you can wire the channel’s negative terminal to the first speaker’s negative terminal and the channel’s positive terminal to the first speaker’s positive terminal.

Step 2: Connect the last 2 speakers to the last 2 channels of the amplifying device normally.

Parallel Wiring

Now that your loudspeakers are wired to the amplifier, you can enjoy increased volume and clarity. If you have any questions about the process, be sure to consult with a professional for assistance.

What Many Speakers Your 4 Channel Amp Can Wire?

A 4 channel amplifier can typically wire four speakers, but some amps may be able to handle up to eight speakers. When wiring multiple speakers to a 4 channel amplifier, it is important to keep the impedance of each sound system in mind.

Most 4-channel amplifiers can handle impedances between 2 and 8 ohms, but some may be able to handle up to 16 ohms. It is also important to ensure that all speakers’ total impedance is within the range the amplifier can handle.

The manufacturer of each product specifies all specifications on the impedance of the amp or speaker. You should carefully review the information we have provided on calculating impedance to know if your amp is suitable or not and how you should wire it.

How To Avoid Overheating And Protect Your Equipment

Overheating And Protect

When wiring a four channel amplifier to six speakers, it is important to avoid overheating and protect your equipment.

  • One way to do this is by using a capacitor. The best car audio capacitor will help smooth out the power signal, which can help reduce the risk of overheating.
  • It is also important to use properly sized wires so the amplifying device can handle the amount of current being drawn. If the wires are too small, they can overheat and cause damage to the amp and speakers.
  • Finally, ensure that all connections are secure and that there is no exposed metal. Exposed metal can cause a short circuit, leading to fires or other damage.

Taking these precautions can help ensure that your amp and speakers will last many years.


Now that we have looked at the procedure for wiring a 4 channel amp to 6 speakers let’s look at some things you need to keep in mind when doing so. The most important thing is to make sure that the amplifier can handle the load. You also need to be careful with your linking and ensure everything is connected properly. If you are uncomfortable doing this yourself, it may be best to take your car to a professional auditory shop and have them do it for you.

If you have any questions or need help wiring your amp, please leave a comment below, and we will be happy to assist you. Thanks for reading!

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