How to Convert a 3-Ohm Speaker to 8-Ohm : Check This Quick Guide

The ohm speakers are influential in emitting audios massively. The speakers have many benefits, such as they generate high-quality sound whether used outside or in the house. Also, the 3 ohm speaker performs better, and it is portable hence easily transferable from one place to another.

What steps can I follow to convert my 3ohm speaker to an 8ohm speaker? You can follow specific steps to obtain a positive outcome in converting your 3ohm speaker to 8ohm one. To begin with, understand the impedance which the 3 ohm speaker can withstand directly or indirectly. Also, have all the necessary materials you may need to complete the work.

The article covers some topics that include the steps to follow when converting the 3ohm speaker to an 8ohm speaker. Also, there are some solutions to frequently asked questions concerning the two speakers. To gain more knowledge, review the article below carefully. Let’s start.

Steps on how to convert 3ohm speaker to 8ohm speaker

Here are some of the steps;

Step 1: choose a 3ohm speaker of high quality that has all materials necessaryhow to convert 3ohm speaker to 8ohm speaker

Tools necessary include the following;

  •  Wire cutter
  • Multimeter
  • Resistor
  • A 3ohm speaker
  • An 8ohm speaker  

Step 2: Change the battery from the 3 ohm speaker

First, check the speaker and disconnect it from the power supply source. Such a process prevents dangers from occurring, such as; electric shock or blowing its internal parts. Also, you may consider wearing protective things such as an antistatic-wrist band.

Step 3: choose the speaker’s wire length you may need.

Inspect the length and the thickness of the speaker wire necessary to connect the amplifier’s input to the speaker input. Don’t forget to record the size by taking pictures using the phone. Remember to think about the route you’ll take to get the wire from the amp to the speaker and back.

Step 4: Insert the 3 ohm wires to that of the 8ohm speaker.

First, ensure the impedance is around 3 to 5, and this process requires using the non-inductive resistor that has wattage ranging from 25 to 50 in series with each speaker in the positive wire. Connect the +ve terminal of the 3ohm speaker (red) to the +ve terminal of the 8ohm speaker (white color). You can do this using either parallel or series methods. Ensure to connect the wires correctly to avoid blowing one of the speakers or even the fuse.

Step 5: Test the speakers.

Connect the battery to the power supply source and test if they receive enough power to switch them on. If not, disconnect the battery from the power supply source and make corrections. Also, seek help if you cannot carry out the process on your own.

How to Connect a 3-Ohm 5-Watt SpeakerHow to Connect a 3-Ohm 5-Watt Speaker

  1. Find amplifiers that can handle greater power than your speakers.
  2. Ensure that the amplifier’s and speaker’s guides are in sync. It’s essential to match the ohms of your speakers with the ohms that the amplifier can handle.
  3. Connect additional speakers to the amplifier. Divide the number of speakers you have by the impedance rating of your speakers, which in our instance is 8 ohms.

Furthermore, the impedance does not remain constant; for an 8 Ohm loudspeaker, it can range from 4 to 20 Ohm, suggesting a 4 to 20 Ohm range. It is vital to provide sufficient reserves for the amplifiers to cope with signal fluctuations.

How to calculate the impedance of both three and 8ohm speakers?How to calculate the impedance of both three and 8ohm speakers?

When using the series connection method, add ohms of each together and obtain the results. For example, 3 ohms and 8 ohms (3+ 8 =11 ohms), and if you are using a parallel connection method, pick one ohm since both speakers have the same ohms. For example, it will be 8 ohms and 8 ohms (8/2 = 4 ohms) because they are two. But if they are three, you divide eight by 3(8/3 = 2.666 ohms)

Frequently asked questions:

  • Is it possible to use a 3-ohm speaker with a 4-ohm amplifier?

Connecting a 3-ohm speaker to a 4-ohm amplifier is not an issue. Only be aware that an impedance is a resistance stated as a complex number, meaning it has a substantial portion (corresponding to the DC resistance) and an imaginary part that reacts differently depending on the frequency of the current passing through it. There will be some reflections at specific frequencies since the two impedances are not equal.

On a transmission below 20kHz, it’s pretty unlikely that you will hear the sound. Your speaker will draw more current if your amplifier has a design that gives its rated output to a 4-ohm speaker. If all other factors are equal, it may sound louder, but your amplifier may overheat, or you may burn the loudspeaker itself if it has a poor make. Connect the loudspeaker if you urgently need to listen to music or something else.

  • Is it possible to use 6-ohm speakers with a 3-ohm amplifier?

Yes. The amount of current drawn from the amplifier depends on the impedance. A higher impedance loudspeaker is safer than a lower impedance loudspeaker when using an amplifier.

  • Does a low impedance imply a high level of quality?

If you don’t have equipment that can sustain a lower-ohm speaker, you might need to turn the amplifier to full blast, harming the equipment. When a receiver or amplifier isn’t adequate for the job, using speakers and amplifiers that aren’t compatible can cause complications. To produce consistent sound across the whole audio range, most demanding speaker designers like to equalize the resistance of their speakers.


When converting a 3ohm speaker to an 8ohm speaker, the sound quality increases and becomes transparent. Fortunately, the article above summarizes the steps to follow to get a positive outcome. First, ensure you have all materials you may need to carry out the process. Seek help if you are unable to carry out the operation.

Finally, there are some precautions to take place when handling the speakers. For example, service the speakers often to prolong their lifespan by removing all dust using a blower. Moreover, understand how to convert the speakers to avoid blowing the whole device. Good luck in converting your 3ohm speaker to an 8-ohm speaker.

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