2 Ohm Vs 4 Ohm Subwoofer


Subwoofers are used to create the necessary bass effect for more immersive sound effects in a home audio system. This ability makes subwoofers unique and different from regular speakers.

In the market, you will find that most subwoofers usually have two ratings- 2 Ohm or 4 Ohm. Here Ohm stands for impedance. This refers to the effective resistance of the circuit or electric component inside the subwoofer to Alternate current.

In simpler words, a subwoofer needs electric resistance to produce a stronger and deeper bass effect.

Many buyers have a common question- whether to buy a 2 Ohm subwoofer or a 4 Ohm subwoofer.

In simple words, a 2 Ohm speaker has a lower electrical resistance than a 4 Ohm speaker. However, it tends to consume a higher amount of electricity. That means, even if a 2 Ohm speaker produces a higher solemnity, the sound quality will be lower than a 4 Ohm speaker.

Let’s understand in detail and take a side-by-side analysis:

2 Ohm Subwoofer Analysis

A 2 Ohm subwoofer has maximum power when the resistance is 2 Ohms.


  • It has a lower electrical resistance and produces a stronger and deeper bass effect.
  • Since the electrical resistance is low, it can get more power through the amplifie


  • Although it produces a louder sound, the sound quality is poor
  • At high volume, the sound is often distorted

4 Ohm Subwoofer Analysis

The maximum resistance inside this subwoofer is 4 Ohm. That means this subwoofer consumes less electricity and produces better and more accurate sound.


  • It consumes less power and saves powerSwitch to block the editor
  • Offers clearer and sharper sound
  • The sound does not distort at higher volumes
  • Stronger than a 2 Ohm speaker


  • The sound is generally not as loud as a 2 Ohm subwoofer.


Let’s look at the following table to get a comparative view of 2 and 4 Ohm subwoofers:

4 Ohms 2 Ohms
It is quieter than a 2 Ohm subwooferOffers a louder sound
The sound and the volume are sharper without any distortionBut the sound can distort at higher volumes
It should be connected to a 4 Ohm to 2 Ohm stereoTo work properly, it must be connected to a 2 Ohm amplifier or stereo
It may take a long timeIt may not take long

Similarities Between 2 Ohm vs 4 Ohm Subwoofers

  • Both subwoofers are a good investment and produce deep bass sound effects.
  • Other than that, 4 Ohm and 2Ohm subwoofers have similar price ranges.
  • You can find subwoofers in various shapes and sizes along with other features as well.
  • However, to produce proper sound effects, you need to connect two of these subwoofers to an external stereo or amplifier. For 2 Ohm subwoofers, you need to connect it to a 2 Ohm stereo, while for 4 Ohm subwoofers, get a 2-4 Ohm stereo.

Differences Between 2 Ohm vs 4 Ohm Subwoofer

  • Although a 2 Ohm subwoofer produces a louder sound, it may result in sound distortion at higher volumes. Similarly, high-pitched sounds are also prone to distortion for these subwoofers. In contrast, a 4 Ohm subwoofer has no distortion.
  • A 4 Ohm subwoofer is no louder than its 2 Ohm counterpart. However, the sound it produces is clearer and sharper.
  • The 4 Ohm subwoofer consumes less power and also saves energy
  • One of the differences between 4 Ohm and 2 Ohm subwoofers is their longevity. A 4 Ohm sub lasts longer and offers consistent sound effects compared to a 2 Ohm model.

Which One Will You Choose?

Well, both have their own merits and demerits. Here are some points that will help you choose the right option-

  • A 2 Ohm subwoofer is louder, but 2 Ohm models are also more prone to distortion.
  • In contrast, the 4 Ohm subwoofer offers a deeper bass effect. It produces a clearer sound without distortion. But it is relatively quiet compared to 2 Ohm.
  • If you want louder sound, get a 2 Ohm subwoofer. But if you want a clear and deeper bass effect without any sound distortion, a 4 Ohm subwoofer is your best choice.
  • If you intend to save some on your electricity bills, it is better to go for the 4 Ohm models. These models do not consume much electricity. In contrast, a 2 Ohm model requires more electricity to produce louder sounds, increasing your bills in the long run.
  • If you want to buy something that lasts a long time, it is better to use a 4 Ohm subwoofer. These models usually last longer and require less maintenance than the 2 Ohm model.
  • 2 Ohm subs are more expensive than 4 Ohm. But you can always choose according to your budget.
  • Also, you can find different models in different shapes, sizes and even colors. So, choose whoever you want!

Which is Better: 2 Ohms or 4 Ohms Subs?

While the 2 Ohm subwoofer is louder, the 4 Ohm woofer is clearer without distortion. But both offer good sound effects. So, in the end, the choice depends on your personal preference.

How to Test 2 Ohm vs 4 Ohm Subs

If you want to know and test the impedance of the subwoofer, always refer to the product box or the model of the subwoofer to know the details. Most woofers come with their impedance rating mentioned.

If no such rating is given, look for the RMS rating, it will say either 2 Ohm or 4 Ohm.

Besides that, you can always check the difference by listening to both models. If a model is louder but the sound is shaky or unclear, it is a 2 Ohm subwoofer. On the other hand, a subwoofer with better bass effects without any vibration or distorted sound is a 4 Ohm subwoofer.

Frequently Asked Questions

1. What hits the punchier, the 4 Ohm or the 2 Ohm?

If you’re looking for hard-hitting bass effects, 4 Ohm and 2 Ohm subwoofers are ideal. The former offers a louder sound, while the latter is known for a deeper bass effect.

  1. What Happens if you replace a 2 Ohm Speaker with a 4 Ohm?

4 Ohm and 2 Ohm subwoofers require an amplifier or stereo. While the 2 Ohm model requires a 2 Ohm amplifier, a 4 Ohm model can be used with both 4 Ohm and 2 Ohm stereo.

Therefore, you can replace the 2 Ohm subwoofer with a 4 Ohm subwoofer if your music system is compatible and has the necessary stereo and compatible cables.

  1. Can We Connect a 2 Ohm Subwoofer to a 4 Ohm Amplifier?

You should never connect a 2 Ohm subwoofer to a 4 Ohm amplifier. A 2 Ohm subwoofer only needs an amplifier with a minimum impedance of 2 Ohm. Anything above that level is dangerous.


2 and 4 Ohm subwoofers are good and offer good bass effects. While the former offers a louder sound, the latter is clearer. But you can always choose depending on the budget and your personal preference.


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