How to Wire 4 Speakers to 2 Channel Amps? (3 Easy Methods)

In this article, I’ll explain how you can connect four speakers to a 2 amp channel through three different techniques.

If you are a person that thinks you can only connect two speakers to 2 channel amp, you are dead wrong. In truth, you can connect multiple speakers and get higher sound quality from your audio system. You can do this by following three different methods.

Follow these two methods to wire four speakers to 2 channel amp.

  • Wire the speakers in a series connection.
  • Wire the speakers in a parallel connection.
  • Use a switch box

Read on to learn more about these three methods.

Three  Ways to Connect 4 Speakers to 2 Channel Amp

Please be cautious because following the wrong process might damage your audio equipment permanently. With that in mind, let’s get started.

Method 1 – Connecting Speakers in Series Configuration

The series configuration is the first method that I’m going to talk about. This method is relatively easy. But it isn’t the most recommended method.

For instance, this configuration won’t give you the best speaker output. However, four speakers will work together to produce effective sound output from your system.

Here is a diagram and the steps for the series configuration.

four speaker's amp

  1. Buy four matching speakers for your two-channel amp. Remember to check the ohm value of all equipment before buying.
  2. Find the positive and negative terminals of the amp and the speakers.
  3. Connect the amp’s positive terminal to 1st speaker’s positive terminal (check the above diagram).
  4. Connect the 1st speaker’s negative terminal to the 2nd speaker’s positive terminal.
  5. Follow the step 4 procedure for all four speakers.
  6. Connect the amp’s negative terminal to the 4th speaker’s negative terminal.
  7. Double-check all the wire connections.

Method 2 – Connecting Speakers in Parallel Configuration

If you want the best sound output from your amp and four speakers, connecting them in a parallel configuration is the best solution.

Here are the diagram and steps for parallel configuration.

amp four speakers

  1. Connect the amp’s positive terminals to the 1st speaker’s positive terminal.
  2. Connect 1st speaker’s positive terminal to the 2nd speaker’s positive terminal.
  3. Do the same for all speakers (2nd, 3rd, and 4th).
  4. Connect the amp’s negative terminal to the 1st speaker’s negative terminal.
  5. Connect 1st speaker’s negative terminal to the 2nd speaker’s negative terminal.
  6. Do the same for the 3rd and 4th speakers.
  7. Check all the connections one more time and test your new sound system.

Method 3 – Using a Switch Box

A switch box is another way to wire four speakers to a 2 channel amp. However, this is not the best method out there. I highly recommend this method if you cannot follow the above two methods. Installing a speaker switch box will cost you more money since you have to buy a switch and more wires.

Besides that, this is pretty easy to execute, and you can control the sound level of all speakers from one switch.

Here are the diagram and steps for connecting a switch box to 4 speakers.

switch box - amp four speakers

  1. Connect all of the speaker positive wires to the positive terminal of the switch box.
  2. Repeat the same process for negative terminals.
  3. Connect the two-channel amp to the speaker switch box.

How to Identify the Speaker’s Positive and Negative Terminals?

Identifying the amp’s positive and negative terminals is simple. The manufacturers often print the + and – markings on the amp. But when it comes to speakers, you may or may not be able to find these markings. That is why, in this section, I will teach you how to identify the polarity of the speakers.

Use a Digital Multimeter

For this, you’ll need a digital multimeter and two alligator clips.

  1. Unplug all other components from the speaker.
  2. Set the multimeter to voltage settings (200mV).
  3. Connect the red lead to any speaker wire.
  4. Connect the black lead to the other wire.
  5. Check the multimeter reading.

The red lead is connected to the correct positive wire or terminal if the multimeter reading is positive.

However, the red lead is connected to the negative wire or terminal if you get a negative reading.

Video Reference

Charcoal Monkey

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About Sam Orlovsky

b1d87d2ee85af3e51479df87928bdc88?s=90&d=mm&r=gCertifications: B.E.E.
Education: University Of Denver - Electric Engineering
Lives In: Denver Colorado

Electrical engineering is my passion, and I’ve been in the industry for over 20 years. This gives me a unique ability to give you expert home improvement and DIY recommendations. I’m not only an electrician, but I also like machinery and anything to do with carpentry. One of my career paths started as a general handyman, so I also have a lot of experience with home improvement I love to share.

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