Do I Have to Use Both Voice Coils on the Subwoofer?

Do I Have to Use Both Voice Coils on the Subwoofer - Featured Image

When it comes to using both voice coils on a subwoofer: it depends. Before diving into this topic, let’s clarify a voice coil. It’s an essential speaker component that converts electrical energy into mechanical energy, producing sound waves.

Now, back to the question at hand. If your amplifier can handle the power output of both voice coils, then yes, you should use them. This will maximize the performance and efficiency of your subwoofer.

However, if your amplifier is not powerful enough or you don’t need that much bass, only one voice coil may be sufficient.
It’s important to note that using both voice coils does require proper wiring and setup.

If done incorrectly, it could damage your equipment or result in poor sound quality. So, consult the manual or seek professional advice before making any changes.

Difference Between Dual Voice Coil (DVC) and Single Voice Coil (SVC):

Voice Coil Examples

You may have heard of dual voice coil (DVC) and single voice coil (SVC) speakers in car audio. But what’s the difference?

Well, a DVC speaker has two separate coils wrapped around the same cylinder, while an SVC speaker only has one coil.
The main advantage of a DVC speaker is that it allows for more flexibility in wiring configurations, which can come in handy if you’re trying to match your amplifier’s ohm load or bridge channels.

On the other hand, an SVC speaker may be simpler and easier to install. So, the choice between DVC and SVC comes down to personal preference and your specific audio setup.

Here’s a table summarizing the main differences between Dual Voice Coil (DVC) and Single Voice Coil (SVC) speakers:

FeaturesSVCDVC
Number of Voice Coils12
Terminals24
Wiring OptionsLimitedMore Flexible
Impedance OptionsLimitedMore Options Available
Power HandlingTypically LowerTypically Higher
Subwoofer BridgingNot applicableIt can be bridged for more power
Multi-Subwoofer SetupsPossible but less flexibleMore flexible and easier to configure

Remember that these are general characteristics, and the specific performance and features of SVC and DVC speakers can vary based on the manufacturer and model.

Can You Use One Voice Coil on a Dual Voice Subwoofer?

A subwoofer is crucial if you’re an audiophile or love the high-quality sound. However, sometimes things don’t go as planned, and one of the voice coils in your dual voice subwoofer might stop working. In such cases, you may wonder.

The answer to this question is not straightforward because using one voice coil will undoubtedly impact the performance of your subwoofer. 

A dual voice subwoofer can handle twice as much power as a single voice coil subwoofer, but using only one voice coil means you’ll lose half of its potential power handling capability. This could lead to lower output and less bass response than your subwoofer initially intended for. 

Therefore, unless you have no other choice, using a dual voice subwoofer with just one voice coil is not recommended. Always refer to the manufacturer’s instructions before modifying your audio equipment, and seek professional help to ensure optimal performance.

Do I Need to Use Both Voice Coils?

Do you need to use both voice coils? The short answer is no, but it ultimately depends on your goals and preferences. If you have a single voice coil subwoofer, use only the coil.

Whether or not to use both voice coils comes down to personal preference and the specifics of your audio setup. Consider some factors such as power handling, desired volume levels, and available wiring options when making this decision. 

As with any audio upgrade, experimenting with different configurations can help you find the best sound for your needs.

When to Use a Single Voice Coil?

There are many options available in the market. One of the most popular choices is a single voice coil (SVC) speaker. The main advantage of an SVC speaker is that it is easy to install and set up. They are also generally less expensive than dual voice coil (DVC) speakers.

SVCs are ideal for smaller setups or budget-conscious systems as they can handle most types of music. However, an SVC might not be the best choice if you’re looking for a method that can really pack a punch.

While they can produce good sound quality, they won’t be able to blow the roof off your house like some other speakers.

Another factor to consider when deciding on an SVC is the type of amplifier you plan to use with it. An SVC usually requires only one amplification channel, while a DVC requires two channels.

This means an SVC could be a better fit if you have limited space or resources.

Efficiency and Power Requirements:

When deciding whether to use a single voice coil speaker, efficiency and power requirements should be among your top priorities. These speakers can offer impressive performance without putting too much strain on your power supply.

Regarding power requirements, single-voice coil speakers are perfect for those with limited access to power sources or who are looking for an energy-efficient solution. With these types of speakers, you can save money on electricity bills while enjoying quality sound.

Space and Enclosure Constraints:

If you have limited space or are working with a smaller enclosure, a single voice coil may be your best option. It’s important to consider how much power you’ll need as well. 

“I recently had an experience with choosing a suitable voice coil for my speakers. It can be overwhelming when deciding whether to use a single or dual voice coil.

After researching, I found that using a single voice coil can be beneficial in certain situations. For example, if you have limited space in your car or home theater setup, a single voice coil speaker may be the better option as it takes up less room and is easier to install.

Additionally, single-voice coil speakers are typically more affordable than their dual-voice coil counterparts.”

What Happens When You Use One Voice Coil on a Dual Voice Coil Subwoofer?

Using only one voice coil on a dual voice coil subwoofer can lead to some changes in how your audio system performs. The most obvious difference is that you’ll lose half of the power handling capacity of your subwoofer, which means that it won’t be able to produce as much bass. This could impact the overall sound quality of your music.

1. Halved Power Handling:

The halved power handling may be affected when you use only one voice coil on a dual voice coil subwoofer. This refers to doubling the impedance halves the power output. 

To understand this better, consider each voice coil as a separate pathway for electrical signals to travel through. When both coils are used, the power is distributed evenly between them, allowing maximum power handling.

2. Impedance Change:

Using only one voice coil on a dual voice coil subwoofer will alter its impedance depending on its wiring configuration. Typically, if the two voice coils are wired in parallel, then using one coil will cause an increase in impedance.

Conversely, if they are wired in series, then using one of them would decrease impedance. The exact impedance change and the resulting value may vary depending on specifications and other factors, so it is important to check manufacturer guidelines for accurate information about your specific model.

Overall, when using only one voice coil on a dual subwoofer, you can expect to see some change in impedance.

3. Wiring Configuration:

Two general wiring configurations exist for single-voice coil subwoofers: series and parallel. In series wiring, the positive terminal of one voice coil is connected to the negative terminal of the other voice coil, resulting in higher impedance.

On the other hand, parallel wiring connects both positive terminals together and both negative terminals together and reduces impedance. Depending on your preference and amplifier capability, you can choose between these two configurations using only one voice coil on a dual voice-coil speaker.

4. Altered Sound Output:

When you use only one voice coil on a dual voice coil subwoofer, it can result in changes to the sound output. The exact effect will depend on the subwoofer’s design and other factors, such as the remaining voice coil’s characteristics and system setup.

As mentioned above, using one voice coil may affect the power handling capabilities of your subwoofer, which can limit its maximum output level and reduce its ability to handle higher power without distortion.

Additionally, this altered wiring configuration could influence its frequency response, leading to an uncontrolled frequency range that impairs overall sound quality and accuracy.

General FAQs

Why Use a Dual Voice Coil Subwoofer?

A dual voice coil subwoofer has many benefits, including better power handling and flexibility in wiring options. You can customize your sound with two separate voice coils to fit your preferences and system setup.


What Is the Difference in Sound Output When Using One Voice Coil on a Dual Voice Coil Subwoofer?

One voice coil on a dual voice coil subwoofer will produce a different sound output. It may affect the impedance and power handling of the subwoofer, leading to a change in the overall performance.


Should I Use Both Voice Coils on a Dual Voice Coil Subwoofer?

Yes, using both voice coils on a dual voice coil subwoofer is recommended for optimal performance and power handling. However, make sure your amplifier is compatible with the impedance of the subwoofer’s wiring configuration before connecting both voice coils.

How Do I Know If My Subwoofer Is a Dual Voice Coil?

Look for two sets of terminals on the back to check if your subwoofer is a dual voice coil. They’ll have different colors or be labeled with a “+” and “-” to indicate separate coils. If you’re unsure, consult the manufacturer’s website or manual for more information.

One Comment

  1. Having half the power handling capability is the obvious effect when you only use one coil of a dual voice coil subwoofer, largest change is going to be in the theil/small parameters. Only using one voice coil doubles the electrical QES of the woofer adding to the overall QTS of the woofer. This very practice is used to situations like using a woofer “fee air” or in an infinite baffle. The higher QTS helps the woofer play deeper and flatter but will have a steeper drop in output as you approach the FS. The reduced power handling is not as much a concern in free air and infinite baffle applications due to the increase excursion given the same input power.

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