Connecting Multiple Amplifiers To One Source

There are many options available to connect multiple amplifiers to one source. These options vary from one system to another as different systems have different input/output options.

You may be connecting multiple amps for different purposes like if you have an old amplifier that you think could add value to your audio system.

Most of the people connect two amps together; one for speakers and other for subwoofers. It gives better sound quality.

Wire Multiple Amplifiers To One Source
Wire Multiple Amplifiers To One Source

Some people also attach multiple amps to hear the louder sound. Whatever the reason is, you can wire multiple amps in 4 different ways.

Related: How To Wire/Connect 4 Speakers To A 2 Channel Amp Diagram?

Wiring Multiple Amplifiers To One Source

From our four methods, you can select the one that best fits your audio system.

Method #1

Today many head units have many preamp outputs that you use to connect to the amplifier. If your head unit has multiple preamp outputs, you can use each of them to connect with the amplifier. You can connect as many amplifiers as your head unit can support.

Method #2

As all the head units do not have many preamp outputs, you should check preamp pass-through functionality in your amplifier. Most of the amplifiers include this functionality in internal wiring.

If pass-through functionality is available you can connect two or more amps together. You can connect pass-through output on the first amp to the preamp input on second amp and up to so on.

It could be more complicated for you to understand the internal wiring if you have no technical knowledge.

Also Read: Best 5.25″ Marine Speakers For Motorcycle, Boat And Jeep 2020

Method #3

If your head unit has neither pass-through outputs nor multiple preamp outputs, there is a third option of Y-Adapter or splitter cables.

By using splitter cable, you can convert 1 output on your head unit into two or more. In some cases, it also weakens the signal.

Related: How To Split RCA For Multiple Amps

Method #4

When none of the above methods are working for you, there is another solution for you. Use speaker wires and connect amplifier with head unit. In this case, you will need amplifiers that have speaker level input. Otherwise, you can use Line Output Converter (LOC) to get speaker level inputs. It may charge you extra.

Guide To Wire Multiple Amps Together

Here are some of the things you have to keep in mind for better wiring and preventing any failure or system damage.

One Amp with Multiple Channels or Multiple Amps, Which is better?

The choice is yours. If you are buying a new amp and wondering whether to buy one with multiple channels or multiple amplifiers. Our recommendation is to buy a single amplifier with multiple channels.

Related: How To Hook up/Install An Amp Without RCA Jacks

The reason is that everything will be fine and you could your desired number of speakers. It will also save space if you are installing your car or another vehicle.

However, if you already have multiple amps and you just want to connect them, you can do so if you have enough choice. Then there is no problem and you can install them.

If you install multiple amps, make sure you provide them enough current.

Grounding All The Amps

You can use power distribution block to power all amplifiers from the single power cable and ground them from the power block instead of grounding and powering each amplifier individually.

If you have other audio components, you can also ground them from the power block. In this way, you will be avoided from many grounding issues.

Also Read: The Best 5.25″ Car Speakers For The Money

Closing Thoughts

This was our guide to connect multiple amplifiers to one source, hope this will help you a lot. You can wire multiple amps together and get better sound quality than a single one. If you have any further queries, comment below.

Noor Alam

Hi, I’m Noor Alam, founder of SpeakersMag.com. I love music and got my Bachelor’s degree in Sound Engineering. Now I have started my own blog about music products. Just like you, I also love different music products and in my spare time, I share my knowledge with audio lovers on this site.