What is better 2ohm or 4ohm?

Updated: 8/30/2023
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13y ago

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The difference is 2 ohms.

Another difference is that the 2 ohm speaker will draw more power from a given amplifier than a 4 ohm speaker will draw. If the amplifier is not rated for two ohms, then the two ohm speaker may draw more than the amplifier's rated power, and the amplifier may be damaged as a result.

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14y ago
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8y ago

Yes, you can use 2 in series, IE daisy chain them to add up to 8 ohms.

For stereo you would need 4 speakers not 2. mono, 2 not one.

Most Amplifiers work OK driving to a lower impedance loads anyway so just hook them up. Very high power levels may overheat the amp, but at normal volume it should be fine.

Something important is added:

There are no 4 ohm or 2 ohm amplifiers!

The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout << Zin. That means that the output impedance of the amplifier is much less than the impedance of the loud speaker.

The damping factor Df = Zin / Zout tells you what Zout is.

Zout = Zin/Df.

If the damping factor Df = 200 and the loudspeaker impedance is Zin = 4 ohms, the output impedance of the amplifier is Zout = 4 / 200 = 0.02 ohms.

You see, there are no "4 ohm or 2 ohm" amps with a 4 ohm or 2 ohm output.

Scroll down to related links and look at "Voltage Bridging - Zout < Zin".

the is the same assuming the volume is set the same. just efficiency changes

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11y ago

Ohms is a measure of resistance to electric current. In this case, electric current is the audio signal coming from your stereo.

The lower the Ohms, the more current (power) the speaker will draw from the equipment.

For car electronics in general, 4 Ohms is usually better. Most car radios are designed to drve 4-Ohm speakers.

One exception is very old (generally pre-80's) stock GM radios. They are designed for 10 Ohm speakers.

If you are using an amplifier, check your amplifier's specs and use what it reccommends. Some will take 2 Ohms.

If your Ohms are lower than the specifications call for, it can cause the amplifier or radio to overheat and can destroy the audio output section.

It depends on what you consider "better".

Any amplifier will be able to damp an 8 ohm 'speaker better than it can a 4 ohm one. Which is always a good thing.

However, this is unlikely to be important in a vehicle since fidelity is not as important as volume.

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14y ago

you can't really answer this without knowing the voltage, and current that you're enquiring about. an ohm is equal to a volt, divided by an amp.

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13y ago

2 Ohms, as a personal opinion, is better because your amp can push more because there is less resistance for the amp to fight and your amp will give you more usable power.

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Q: What is better 2ohm or 4ohm?
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