When choosing subwoofers, one of the most common questions is: What hits harder 2 ohm or 4 ohm? If you are one of those people who are puzzled between 2 ohm vs 4 ohm, this post is for you.
Ohm is one of the critical factors when buying a subwoofer. It is an electrical resistance SI unit indicating how much power a subwoofer can hold and the amount of power it can transform into sound.
The head unit power will not have the same power that an amplifier can give. The subwoofer will need the extra power from an amplifier to function at its best.
When comparing a 2 ohm vs 4 ohm subwoofer, you can find subs that can operate at the same wattage, but the 4-ohm sub will require less power to reach its full potential.
2 Ohm Subwoofer Overview: Does a single voice coil produce a louder sound output than dual voice coils?
A subwoofer that comes with a lower electrical resistance produces a louder sound compared to a subwoofer with high resistance. In short, a 2 ohms subwoofer is louder than a 4-ohm subwoofer.
While a 2 ohms subwoofer is louder, it may still produce a poorer sound quality because of its power consumption. This subwoofer also has a single voice coil that features fewer winding turns caused by the low resistance it offers to the incoming amp power.
4 Ohm Subwoofer Overview: A higher electrical resistance or more power?
Do you own a 4-ohm subwoofer? Then, you can expect a high electrical resistance. This subwoofer also uses less energy. As a result, it can last longer compared to car speakers with lower resistance values.
A 4-ohm subwoofer produces less sound than a 2-ohm speaker. On the other hand, the sound produced can be more compound. This means you will get better quality sound even if it is not easily noticed.
What Hits Harder a 2-Ohm Subwoofer or a 4-Ohm Subwoofer?
The answer depends on how a person defines hitting hard and personal preference. When it comes to 2 ohm vs 4 ohm head-to-head comparison, here’s what you need to know:
2 Ohm Offers Louder Bass
The impedance (resistance) of 2 ohm is lower, so you will get a punchier and great-sounding bass. However, you can expect a poorer quality, typically drawing more power according to the Ohm’s Law.
4 Ohm Offers Deeper Bass
In terms of bass, 4 ohm produces a clearer sound, and you can easily notice it.
You have to decide whether you like a deeper or louder bass. Please note that a 2 ohms subwoofer is a bit pricier than the 4 ohm one. Also, a higher impedance rating means that the subwoofer weighs more.
Is 2-Ohm Subwoofer Better than 4-Ohm Subwoofer?
Again, the answer depends on your personal preference, which resistance is better. If you are still unsure, here are your options:
- If you like a lower-cost option, choose 4 ohm since 2 ohm is pricier.
- For a cleaner and deeper sound, you can opt for 4 ohm as a better option.
- If you like a punchier and better sound, you can go for 2 ohm as a better option.
Both 2-ohm and 4-ohm sound systems offer good sound quality, and the final judgment is up to you.
The only difference between the two is their prices. However, your choice also depends on the size and brand of subwoofers.
The difference between the 2 ohm and 4 ohm subwoofers isn’t that great. They both produce the same audio signal when run at the same amount of wattage.
Ohms and watts are parts of a series of mathematical formulas putting them together. This means if one of them had changed in value, the other usually did too.
Remember that an amplifier produces electrical pressure in a circuit, where watts measure the amount of power released as work while ohms measure the load or resistance against the pressure.
If you use one of those formulas, your amplifier will provide up to 100-watt power via a 4 ohms speaker or produce 200-watt power via a 2-ohm speaker. That is because it is a lot easier to push the reduced load.
What is the Right Way to Test 2 Ohm vs 4 Ohm Subwoofer for a Car Owner?
When comparing different ohms like 2-ohm subwoofers and 4-ohm subwoofers, you have to consider their total impedance ratings, and they depend on the current type flowing through each.
The impedance is the resistance amount a car audio system offers against the electric current flow via the subwoofer.
This electric current flow is responsible for producing the sound. Then, the resistance the speaker produces against it will regulate the audio quality.
If the audio system offers very low resistance, you can expect that the electric current will flow easily through it. However, if the provided resistance is high, then the current will flow through it with difficulty.
This is equivalent to more power being generated quickly if the electricity flows easily, resulting in louder audio.
On the other hand, if a subwoofer produces louder output, operating at higher power, it has to deal with frequencies from a higher intensity. So, the sound system finds handling lower frequencies simultaneously tricky.
As a result, your speaker will get a low bass quality due to the lower impedance rating, and the electricity flows more easily, resulting in high power. Similarly, if the subwoofer has a higher resistance rating, the result is the opposite.
Your speaker may not be loud because of low current flow, and you can still expect finer bass output. It is because the speaker can handle low frequencies more effectively in comparison to its low impedance counterpart.
How to Know the Amplifier’s Minimum Speaker Ohm Rating
An amplifier’s power specifications are provided by the retailer, manufacturer, etc. In many cases, it is listed both in the owner’s manual and on the package.
When checking the amp’s minimum speaker ohm rating, please take note of the following:
- RMS is the maximum power rating to be used or the CEA-2006 power rating. It is the power spec according to what an amplifier can produce continually and reliably.
- Some manufacturers list misleading or outrageous power numbers on the products.
- The CEA-2006 was created by the Consumer Electronics (CEA) to help consumers determine whether a product displays the advertised specs.
- If the set of specs is too good to be true, do not buy the product. Instead, purchase from reliable manufacturers and retailers.
- An amp can handle a minimum ohms rating, which is the smallest number listed in every channel. It also depends on the channel mode (bridged, stereo, etc.)
Multiple Subwoofers in Series vs Parallel
If you hook up multiple speakers, do not expect free power. That is because connecting multiple speakers to a single output channel makes them share the available power.
Please always keep the following in mind:
Speakers in parallel connection are known to share the power output for the total speaker load. For instance, if you connect two 4 ohms speakers in parallel wiring, it results in 2 ohms. Every speaker will get half of the rated power output of amp at 2 ohms.
Speakers connected in series receive less output. It is because the total power is lower compared to parallel speakers.
For instance, if you connect two 4 ohms speakers in series, they will add to the 8 ohms total load. Furthermore, the power output at 8 ohms is half that of 4 ohms, leaving each speaker with half of that.
Can You Bridge An Amplifier With Low Ohms?
Yes. When you use the bridge amplifier, every bridge amplifier power output will only receive 50 percent of the total load impedance.
This means if you use a bridge with your 4 ohms subwoofer, each amplifier bridge output will have 2 ohms of effective load impedance. Therefore, bridging amplifier can effectively lower ohms.
Is Sound Quality Affected by Ohms?
Your speaker’s sound quality relies on several variables. The resistance in value in ohms can indirectly affect some of these variables. But it cannot directly impact the quality of the sound. In short, it has nothing to do with higher or lower sound quality.
The resistance’s key role is to regulate the power amount a speaker or subwoofer can produce it can directly relate to how loud a speaker can be, particularly since all of the characteristics are similar.
What are the Best Ohms for Speakers?
According to the most common needs, subwoofers or speakers with ohms ranging from 4 to 8 ohms can satisfy the sound and listening needs of the car owners.
A 6- to 8-ohm subwoofer is usually considered the most prevalent device since it lines up specifically well with most audio-video receivers nowadays.
A dual voice coil sub can be wired to give lower or higher resistance, which is a fantastic way to customize the performance of your sub.
Are Higher Ohms Equivalent to More Resistance?
Ohm refers to the SI unit used to measure electrical resistance named after Georg Ohm, a German physicist.
One ohm is the resistance amount the conductor provides to the electricity flow through it when one ampere’s current flows through it at one volt’s potential difference.
This means it’s a unit of measurement with a direct mathematical correlation with resistance. Therefore, if there is a higher ohm rating, expect more resistance while lower resistance with a lower ohm rating.
Is It Better to Have a Lower or Higher Ohms?
Again, there is no exact or straight answer to whether a speaker should have lower or higher ohms. A speaker has a resistance rating calculated in ohms and measures how easy or difficult it is to power a speaker.
In other words, if the speaker impedance is lower, it becomes easier for the music’s electric or audio signal to pass through the subwoofer.
On the other hand, an easy passage does not necessarily mean your speaker is better.
Instead, it means that your speaker with lower ohms is easier to produce loud sound while the one with higher ohms is slightly difficult to produce the same sound since it requires more supply power to do so.
What Happens if the Speaker’s Resistance is too High?
If your speaker’s resistance is severely high, the flow of the current can be very low. This leads to sub-optimal performance because of sufficient speaker absence needs.
While there are some reasons why it occurs, the damaged conductors are usually behind it. While electricity passes through conductors, they get heated and corroded in the long run, leading to overheating and damage which increases the speaker’s resistance.
To wrap it up, a 2-ohm subwoofer cannot be better compared to a 4-ohm one or vice versa. It is because they are both in different aspects.
A 2-ohm speaker produces louder and punchier sound, while a 4-ohm subwoofer provides cleaner and higher-quality bass. So, the choice is up to you whether it is better to have 2 ohm or 4 ohm subwoofer.
Last Updated on: August 1, 2022