How to Hook up 2 amps with 1 Power Wire

Is it possible to hook 2 amps with 1 power? Some people believe that putting an amplifier in their car is too difficult and should be left to the experts. Yes, that is a possibility. At first glance, it could seem not very clear, but it’s not that sensitive. It’s essentially the same as adding a single amplifier, I suppose. Then, I’ll guide you through the proper process so you may learn how to hook up 2 amps with 1 power wire.

But before moving on, you should know why do we hook 2 amps to 1 power wire? So the reason is: Having one amp for main speakers and a second amplifier for a subwoofer. The multi-amp wiring procedure will be necessary if you use several amps.

If you are connecting amp for the first time, don’t worry. We are here to assist you and provide all the necessary information to make the connection. Before proceeding, read the full article. Also, arrange all the necessary equipment and tools before starting the procedure. 

Equipments Required

You’ll need access to the following to hook up two amps with a single power wire.

  • Power line
  • Remote turn- online
  • Ground line
  • Distribution block

Step by Step Method

Step 1 – Remove the positive outstation from your car’s battery.

Start by separating the positive terminal from your car battery’s scars. As you operate with the colorful electrical cables, this will prevent anything from short-circuiting.

Step 2 Run the power line.

Suppose you run two amps on a single power line. In that case, the amplifiers won’t function properly or output their rated power, so be sure the power string is hefty enough to meet their increasing electrical current demands.

The most elegant and practical approach to joining several amps to a single power string is with a power distribution block. The best approach to participate in an electrical circuit, from a single input source to several branch circuit biases, is a practical, affordable method.

Step 3 Connect to the Ground Wire.

Use a ground distribution block to link the grounds of all your amps to a single connecting point rather than resting each amp separately.

Connect each amp to the ground distribution block perfectly within eighteen elevations of the amp’s position, which should join to a suitable subframe ground or lattice that has been mulled down to the basic essential.

Your amp’s ground cables must be the same size as their power cords. Similar to the rope connecting the battery to the power distribution block, the string connecting the ground distribution block to the grounding location needs to be the same size.

Step 4 – Connect the remote-on wire.

A remote turn-on line is a blue line inserted at the back of the head unit. Its main function is to tell your amplifier to turn on whenever the head unit is switched on.

Without the remote switch-on signal, your amplifier won’t turn on.

The problem is that a remote turn-on signal isn’t necessarily necessary to turn on several amps. A suggested solution to this issue is to connect the amps’ turn-on leads to a transmitter activated by your head unit.

A clever approach to turning on two different amps concurrently with just one power line is by using a 12v relay.

The relay, in this instance, needs to be connected to another source of battery energy, either directly from the battery or laterally from the fuse box, rather than receiving power through the head unit.

This effectively separates the head unit’s turn-on signal from your amplifiers, enabling them to turn on and hopefully preventing any current load problems.

Step 5 Connect the Amp to the Head Unit.

How you link your head unit to your amplifiers will depend on the labor that went into it. You can connect each pair to a different amp if your head unit has multiple preamp outputs.

If your head unit lacks several preamp labors, you’ll need to examine your amps. Preamp wiring in built-in amps is occasionally used.

In that case, hook up your first amp’s pass-through labors to the preamp inputs of your alternate amp, and soon. However, you’ll need to divide the signal between your amps using Y appendages; if your head unit doesn’tdoesn’t have several preamp labors and your amplifiers don’tdon’t have pass-through features.

Frequently Asked Questions

Can two amps share the same space?

It would assist if you could avoid the ground circle as long as both amps are based on the same location. They are running to a distribution center or using both grounds to get to the same location yields the same outcome.

Can you link one amplifier to another? 

Using an active crossover is a straightforward method of coupling one amplifier to another. This gadget separates the bass frequency from the high-end audio frequency so it can be sent to separate amplifiers and speakers.

Is bridging an amp preferable?

To deliver all the available power, you should still bridge the amp. Let’s say you require a single channel and have a single driver. If you have 2 speakers, it could be preferable to operate in stereo so that you have less control over the speaker’s movement.

Can RCA power two amps?

Multiple amps can be connected using the RCA splitter. The process is simple; you can connect two or three amplifiers by dividing one RCA jack. Amplifiers are used to replicate the sound by boosting the sound’s volume. RCA cables serve as connectors for joining two electrical devices.


You can wire two amplifiers, or multiple amps, in one auto audio system, but it takes some redundant work, time, and, most importantly, planning. I hope this composition answers your question, “how to hook up 2 amps with 1 power line“.

The most pivotal effects you need to consider when you wire in multiple amps are how you’ll deal with the power string, how to base each amp duly, and how to make the turn-on signal from your head turn on multiple amps contemporaneously.

Still, if you have any distrustfulness or queries, let us know in the comment section. And for further backing, read related articles.

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