A Detailed Guide On How To Wire A Dual Voice Coil Subwoofer

how to wire a dual voice coil subwoofer

The dual coil speaker, typically a subwoofer, can confuse many people. If you pick or wire it the wrong way, you’ll gain less power and sound than expected.

Do not worry! We come out with this guide to help you get things right. In addition, we also provide you with valuable information.

So let’s read on to explore how to wire a dual voice coil subwoofer.

How To Wire A Dual Voice Coil Subwoofer?

Wire A Dual Coil Sub In Series

This simple process requires you to connect the first set of negative and positive terminals before repeating it for the second pair of coils.

Series wiring system will give you higher impedance compared to the parallel one. You can expect to reduce the overall wattage per channel as it splits the power between two coils.

Wire  A Dual Coil Sub In Parallel

This method refers to connecting the positive terminal of a coil to a separate channel on the amplifier. After that, repeat it for the others.

You will need to wire the negative together like in the series wiring system. The parallel wiring leads to half the impedance compared with the serial one, allowing more power from the amplifier into each side.

So you will get a bit of higher output overall.

Difference Between Series and Parallel Wiring

Although it is easy to wire a dual coil subwoofer, understanding the difference between parallel and series wiring is essential.

If you reduce your electricity bills, serial wiring is the way to go because it uses only one channel with half the total capacity of its parallel counterpart.

On the other hand, if your amp can deliver more power in each channel and you prioritize sound quality, parallel wiring is your best bet.

Single vs. Dual Coil Subs: Which Is Better?

Here are some of the differences between single and dual coil subwoofers:

  • The magnets in the single coil sub are not as strong.
  • The single coil sub is less efficient than its dual coil counterpart as it moves further for a wider frequency range.
  • The dual coil sub features a wider frequency range than its single coil counterpart.
  • The single coil sub can handle less power than its dual coil counterpart, thanks to the added impedance from one set of wires for each coil.

There is no correct answer to the question, “which one is better?” The choice of one or the other will depend on a mix of the following things:

  • Your amplifier’s minimum speaker load rating (Ohms).
  • Your amplifier is bridgeable or stereo only.
  • How many subwoofers/speakers do you want to use?

The higher power car amp is bridgeable while the home stereo amp is not. Never assume that your amp is bridgeable. Instead, always double-check!

Pros of Dual Coil Subwoofer

A single coil subwoofer (or standard subwoofer) works well with many systems. Yet, the dual coil subwoofer offers users some advantages and versatility.

Maximum Amplifier Power Output

Nowadays, most car amps feature a specific power rating (by Watts) at the particular speaker load rating (Ohm).

For instance, a mono amp may come with the following ratings:

  • 350 W RMS power rating at four ohms
  • 600 W RMS  power rating at two ohms
  • 1,000 W RMS power rating at one ohm

Assuming you’d like to utilize a mono (single) bass setup while only owning one sub. You are typically limited to six hundred watts from the amplifier as you typically find a two-ohms sub or higher available.

Although adding the second two-ohms sub and doing parallel wiring is okay, you will need a larger box, utilize larger installation space, and spend more money.

You might consider parallel wiring a two-ohm DVC sub, like the Rockford Fosgate R2, to let your amplifier reach full power. If not, it is almost impossible to hit the power capacity as you would expect from your amp.

Amplifier Channels & Special Setups

Amps can’t always be bridged. It can be a massive problem if you have a single four-channel amp. You might be scratching your head figuring out how to add a sub and power it without buying a second amplifier.

With the dual sub, you can use a channel for each voice coil to boost your sub with adequate power.

Multiple Subwoofers/Amplifier Impedance Matching

If you wire multiple subs to the same amp, the Ohms load your amplifier sees will depend on the subs’ parallel or series wiring combination.

The dual coil subwoofer offers more options since it enables you to select more overall Ohm load combinations, which will match the minimum rating of your amplifier.

Ability to Utilize For Car or Home Stereo Systems

In most cases, using eight-ohm subs efficiently for your car audio system is impossible since they cannot deliver the power as a four-ohm speaker.

You also cannot use car subs with two or four-ohm ratings with the home stereo amps as they are below the minimum amplifier spec.

They can lead to your home amplifier overheating, shutting down, or permanently damaging. That’s when the voice coil speaker comes into play since you can utilize a dual four-ohm sub for home and car use:

  • Do series wiring for eight-ohms for your home stereo.
  • Do parallel wiring for two-ohms or use a single four-ohm for your car amplifier amp.

How to Select & Match One Dual Coil Sub to Your Amplifier

To pick the proper dual coil subs, you need to consider the following:

  • Your amplifier’s lowest speaker load rating (Ohms) at the power level you expect.
  • How many subs do you want to utilize?

We recommend checking the label printed or your owner’s manual of the amp to know the minimum speaker load that is reasonable with the highest power rating load.

After that, choose the correct number of the dual coil sub you can wire to fit your amp’s requirements.


What Is a Dual Coil Subwoofer

The dual coil sub is a speaker type with two coils, an output, and an input wire.

This speaker is very common, and you can find them in various electronic devices, such as sound systems and televisions.

This sub has two dual coils: one is connected to an amplifier’s positive terminal while the other is connected to its negative terminal.

Each should produce a different frequency range, allowing this speaker to generate a broad range of frequencies rather than one.

How to Tell if My Speakers Are SVC Or DVC?

The main differences between an SVC and DVC subwoofers are easy to notice. A dual coil sub will feature two sets of terminals, one for each coil within the sub.

Meanwhile, a single coil sub only has one set of terminals as it only has one internal coil wrapped around the cylinder.

Can I Bridge a Dual Coil Sub?

Although it is possible to bridge one dual coil sub, each channel’s impedance will typically be half that of a single coil sub. If one voice coil is 2 ohms and the other is 4 ohms, each channel will be a single ohm.

Does the Dual Coil Sub Require More Amplifier Ower?

To wire a dual coil sub in parallel, you will need at least four wires going to your speaker terminals. The extra power from the amp will be divided by the total speakers in parallel wiring.

Take Away

So we’ve just walked you through the steps required to wire a dual coil sub.

For many good reasons, a dual coil sub is an excellent device to add to a home or car audio system. For beginners, setup the dual coil sub is easy, and you can customize it to exact specifications.

The dual coil sub is more affordable than the high-end audio speaker. As a result, it is the only speaker we recommend in the home setting.

This speaker has a good range and can generate many basses if you connect it to the proper amps. Also, they will not overheat if you wire them up correctly.

Also Read: How To Connect 4 Speakers To A 2 Channel Amp?

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