How to make your 4-ohm speakers work with an 8-ohm amplifier

So you have some speakers, but it seems like to know How to make your 4-ohm speakers work with an 8-ohm amplifier

No problem! You can actually convert your 4-ohm speakers to work with an 8-ohm amplifier. This article will walk you through how to convert them and what you will need to make them work. With this, you should be able to use your speakers with any amplifier just by changing the values of a few components.

How to make your 4-ohm speakers work with an 8-ohm amplifier

Related Article: Can You Run 4-Ohm Speakers On An 8-Ohm Stereo System?

What is an 8-ohm amplifier?

An 8-ohm amplifier is an amplifier that works with a speaker of a 4-ohm impedance. To make your speakers work with this type of amplifier, you just need to change the values of some components.

How do you convert your 4-ohm speakers to work with an 8-ohm amplifier?

The first step is to identify the speakers. If you have a stereo system, you will need two speakers and they should be labeled as 4-ohm. If it is just one speaker, it is also probably 4-ohm. To convert your speakers for an 8-ohm amplifier, you will need to do some wiring. The wiring diagram below shows how to make this happen:

Red wire from Speaker A (4-ohm) -> Blue wire from Speaker B (8-ohm)

Black wire from Speaker A (4-ohm) -> Black wire from Speaker B (8-ohm)

Green wire from Speaker A (4-ohm) -> Green wire from Speaker B (8-ohm)

The tools you will need to make the conversion

Here is what you will need to change the values of a few components on your speakers:

– Wire cutters

– Soldering Iron

– Solder

– Heat shrink tubing

– Multimeter (or continuity tester)

How to change the values of some components

The first thing you’re going to need is an isolation transformer. This will allow you to connect your 4-ohm speakers to the 8-ohm amplifier. The next thing you’ll need is a voltage divider. A voltage divider will allow you to change the value of an input signal by using resistors in series and parallel. For this project, the resistor values of R1 and R2 should be 2k ohms and 10k ohms respectively.

You will also need four resistors with values of 22k ohms, 100k ohms, 220K ohms, and 470K ohms for this project as well.

Lastly, you will need a power cord that has two female ends on it so that both ends can be connected to the isolation transformer and voltage divider.

Components for a 4-ohm to 8-ohm speaker conversion

To convert your 4-ohm speakers to 8-ohm, you will need the following items:

A resistor – This is a device that reduces electrical current. You can measure a resistor in ohms and it will have a color code like red (4-ohm), black (8-ohm), yellow (6-ohm) and brown (5.6-ohm).

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Some wire – Wire is an electrical conductor that will allow you to connect components together. It usually has a circular copper wire with a thin insulation around it.

A soldering iron – This tool will heat up and melt the wires together so they are connected. A soldering iron has different tips for different uses but generally does not have more than one temperature setting.

A solder – Solder is an alloy of metals that flows easily when heated and sticks to surfaces when cooled down. It is used to join two metals or materials together, typically by melting the solder onto them.

hat is the difference between 4 and 8-ohm speakers?

The difference between 4-ohm and 8-ohm speakers is that the impedance of the 8-ohm speaker is greater. Impedance is a measure of how much resistance a speaker has to electrical flow. The higher the impedance, the more electrical power it takes to send an appropriate amount of current through it.

In order to make your 4-ohm speaker work with an 8-ohm amplifier, you need to convert it by changing the values of a few components. You need an amplifier with a minimum impedance rating of 4 ohms and two resistors with their combined resistance equaling 8 ohms.

The Difference Between 8-ohm and 4-ohm Speakers

The first thing to know about 4-ohm and 8-ohm speakers, is that they differ in the way they handle electricity. An 8-ohm speaker will draw twice as much power as a 4-ohm speaker when plugged into the same circuit. This can cause serious problems if you don’t have an amplifier with the capacity to provide that power.

The second difference between 8-ohm and 4-ohm speakers is how they are wired together. When two or more speakers are connected in series, they form what is called a “multi-load” impedance, which means that the amount of voltage needed to drive them will depend on the total combined impedance of the system (as opposed to each individual speaker). In this case, the impedance of both speakers should be considered when determining whether or not there will be enough voltage.

How to Power Your Speakers Safely

If you’ve got an 8-ohm amp and 4-ohm speakers, the safest way to power the speakers is to use a 4-ohm impedance matching transformer. This means that the amp will see a load of 8-ohms, even though the speaker sees a load of 4-ohms. The transformer will also protect your amp from being overdriven.

Alternatively, you could wire one speaker in series with another speaker. The impedance across both wires would be 8 ohms – it won’t matter if the wire is soldered together or not. You just have to make sure that both speakers are the same impedance as well.

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What to Consider When Buying Speaker Wire

When you’re buying speaker wire, make sure to pay attention to the impedance. This will tell you which power amp you need for your speakers.

For example, 4-ohm speakers are safe to connect with 8-ohm amps, but 8-ohm speakers need an amp that can handle at least 16-ohms.

If your amp isn’t compatible with your speaker wire, it will either short circuit or overheat and stop working. This can be bad for both your equipment and you as it will cause a fire or start a flame.

To avoid these issues, make sure that you buy the right type of speaker wire before connecting anything together.

What is Impedance?

Impedance is the measure of how much electrical resistance a speaker has. As you might imagine, the higher the impedance rating, the more resistant it will be to electrical current. The lower the impedance rating, the easier it will be for electricity to pass through. For example, most car speakers have an impedance rating of 4-8 ohms; this means that they are very easy to power and are typically not a problem to work with an amplifier that has a different impedance rating.

Powering Speakers Safely

A 4-ohm speaker is an impedance that draws a lower amount of power from an amplifier than 8-ohm speakers. For example, if you have a 4-ohm speaker and an 8-ohm amp, the amplifier will deliver half the current to each speaker. The amplifier will also put out a quarter of the wattage (power) to each speaker. A 4-ohm speaker needs less power to produce loud volumes because it has lower impedance (resistance).

Fortunately, there are some ways to safely power your 4-ohm speakers with an 8-ohm amp. One option is to wire both speakers in parallel, which means you connect the positive wires together and then do the same for the negative wires. This will give you two sets of 4 ohms total rather than one set of 8 ohms when powered by a single amplifier. You can also use a crossover network, which splits the signal from your receiver into high pass and low pass signals. This allows your amp to only drive low frequencies to your subwoofer and high frequencies to your tweeters or full range speakers.

how to wire ywo speakers together

To wire two speakers together, all you need to do is repeat the same process. Wire the positive terminals of both speakers together and then wire their negative terminals together. After this, you can plug them into your amplifier.

How to change speakers

to 8-ohms

1) You will need to identify which of your speakers has the highest impedance. In order to do this, you will measure the resistance across each of your individual speakers and find the one with the highest resistance.

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2) Once you find it, you need to add a resistor with a value of 4-ohm in series with that speaker. This will lower the impedance by four ohms for that speaker and make it compatible with an 8-ohm amplifier.

3) For the other speakers, you will want to add a resistor with a value of 3-ohm in parallel with that speaker. This lowers each speaker’s impedance by one ohm and makes them compatible with an 8-ohm amplifier.


Will this work for any 4-ohm amplifier?

Yes, as long as the speaker can handle the power of the amplifier.

What happens if I convert my speakers to 8-ohms and they still don’t work?

Check the wiring on your amplifier. The wiring may be incorrect and if that is the case, you need to fix it before you try to use your speakers with an 8-ohm amplifier again.

What is the difference between 8-ohm and 4-ohm speakers?

4-ohm speakers require more power than 8-ohms. An 8-ohm speaker will work just fine with a 4-ohm amp, but a 4-ohm speaker won’t always work well with an 8-ohm amp.

How should I power my 4-ohm speakers with an 8-ohm amp?

You can connect your 4 ohm speakers to an 8 ohm amplifier by using a Power Factor Corrector circuit. This ensures that your amplifier is not overworked while you still get the full volume of sound from your speaker.


You may have an 8-ohm amplifier and want to use your 4-ohm speakers with it. You may also want to change your speakers to 8-ohm. The good news is that you can do both fairly easily with some simple changes to the equipment.

What amplifier do I need?

You need an amplifier that matches the impedance of your speakers, either 4-ohm or 8-ohm.

What is the difference between 4 and 8-ohm speakers?

The main difference is that the power output of an 8-ohm amp is twice as much as a 4-ohm amp. This difference becomes more significant when you consider that most amplifiers have a finite power output.

How do I convert my 4-ohm speakers to work with an 8-ohm amplifier?

The easiest way is to add a capacitor to the circuit. This will help to maintain the current flow through the amplifier and prevent it from overheating.

What components do I need?

Here are the components you will need: a 4-ohm speaker, two capacitors, two resistors and two jumpers.

How do I wire ywo speakers together?

There are three ways you can wire two speakers together: parallel, series and in series