How to Change a 4-Ohm Speaker to 2 Ohms?- Easy Steps

In-car audio loudspeakers with a 4-ohm impedance are customary. Since the automobile sound system operates on 12-volt DC rather than 120 voltages Alternating Current, that’s the case. When car sound loudspeakers with a 4-ohm resistance, you can gain greater wattage from a relatively low voltage audio amplifier. Car stereo amps have a design enabling them to work with minimal resistance speakers.

Wiring a 4-ohm speaker system to 2-ohm speakers is standard procedure among car stereo specialists. Only when you wire the amp is correct to the speakers will it work correctly. Incorrect cabling might cause both the amplifiers and the speakers to malfunction. To produce the best quality sound, your car’s audio equipment must be correctly connected.

The article illustrates how to change a 4-ohm speaker to a 2-ohm speaker. For the most outstanding results, pay close attention to the instructions. You’ll also discover the most commonly asked questions about this subject, as well as their solutions. It will assist you in gaining a better knowledge of your requirements.

How to convert a 4-ohm speaker to a 2-ohm speaker?

how to change a 4 ohm speaker to 2 ohm

To achieve consistent quality over the whole audio spectrum, some engineers prefer to balance the impedance of their speakers. Electrical circuitry, analogous to sanding a piece of wood to remove high grain ridges, could be used by a speaker engineer to flatten areas of high resistance.

4-ohm speakers are ubiquitous in high-end audio but uncommon in mass-market audio due to the extra focus. The resistance of the speaker changes as the pitch of a sound rises and lowers. The impedance specification for the speaker is merely a rough average. The steps below show the steps to follow to convert the 4ohm speaker to a 2ohm speaker successfully.

Tools necessary

  • 2-ohm speaker
  • 4-ohm speaker.
  • Capacitor.
  • Wire cutter.

Step 1:

Change the battery from the system. You must not connect the amplifier and speakers to the power supply.

Step 2: 

Determine the length of speaker wire necessary to connect the amplifier’s input to the speaker input. Remember to think about the route you’ll take to get the wire from the amp to the speaker and back.

Step 3: 

position the wire’s ends into the amplifier’s terminals as well as the speaker wiring terminals.

Step 4: 

Make a connection between the negative wire (labeled white) and the amplifier’s and speaker’s negative inputs.

Step 5:

Connect the battery to the PC. Check to determine if your amplifier and speakers are receiving power. Turn on your amplifier and speakers first. Make the necessary adjustments.

Using a capacitor to boost the bass output

Using a capacitor to boost the bass output

Subwoofer speakers are used to produce bass output; these speakers play lower bass frequencies dedicated to and designed exclusively for that purpose. A lack of power is one of the issues that cause subwoofers to perform poorly. The sound produced by a high-powered subwoofer will be weaker if it does not receive the energy it demands.

A capacitor gives power to the subwoofer’s amplifier when it is working at peak performance. The capacitor connects to the battery and preserves electricity for the amplifier when there is excessive power consumption (for example, when playing bass-heavy music too loudly).

Step 1:

consider not connecting the amplifier’s power wires to the vehicle’s battery. First, check the amplifier to see if it is in good condition before proceeding to the next step.

Step 2:

Unplug the amplifier’s power wires to disconnect them. Here are the cables for connecting to the car battery and the connections for powering up the amplifier. At all times, keep track of which wire is positive and which line is negative!

Step 3: 

Step 3:  There will be a “+” or “Positive” symbol and a “-” or “Negative” sign in each port. Make sure that the correct cables (both positive and negative) are connecting to the relevant computer connectors.

Step 4: 

Cut the same sort of wire that supplies the amplifier with battery voltage. It will be necessary to shorten the length. This wire should be cut into two pieces, each measuring 3 to 4 feet long. Decide which wire will serve as the positive and which will serve as the negative cable.

Step 5: 

Connect the negative terminal of the capacitor labeled “Power Output” with a wire. The opposite end of the wire is connected to the amplifier’s negative power input.

Step 6:

Connect the positive terminal of the capacitors marked “Power Output” to the other wires. Connect the other end of the wire to the positive power input of the amplifier.

Step 7:

It’s a simple procedure to connect the stereo’s power cords to the car’s battery. Start the vehicle and let it idle for around 10 minutes to allow the capacitor to recharge fully. Do not listen to music on your stereo at this time. Please turn on the stereo after 10 minutes to observe how it operates.

Additional detail

Additional detail

When addressing concepts like watts, volts, and power, many audio writers use the analogy of water going through a pipe since it is an analogy that listeners can visualize and relate to.

A lot of amplifiers have a design to allow them to be utilized together with 4-ohm speakers. To use an analogy, you can make the pipe bigger. Even yet, it will only carry more water (audio) if you have a powerful enough pump (amplifier) to produce the extra flow of water.

Frequently asked questions:

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

If you don’t have equipment that can sustain lower-ohm speakers, you might compel it to turn up the amp to maximum volume, 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 impedance of their speakers.


In conclusion, many people wish to connect the two amplifiers to obtain the best sound quality system. If you want to change the 4-ohm speaker to a 2-ohm speaker, follow the steps above carefully to get the best results. Also, remember to follow the manufacturer’s manual guide. When converting the speaker, first, see if the speaker can support the 2ohm system.

Finally, take some precautions when converting the speakers. The safeguards include understanding how to convert the 4-ohm speaker to a 2-ohm speaker. Also, how to raise the bass of the output by using the capacitor. In case of any issue, seek help from a professional technician to help you solve the problem.

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