What Is A Subwoofer? How To Properly Install A Subwoofer

Home entertainment is becoming more popular, instead of relaxing in cafés, tea rooms, or concerts, most individuals would build up a music entertainment space in their wonderful homes. The subwoofer is regarded to be a great aid in distributing sound and increasing the enjoyment of your music celebration. Let’s learn more about What Is A Subwoofer? How To Properly Install A Subwoofer with Casual Living USA!

1. What is a subwoofer?

A subwoofer is a speaker that produces low-frequency sounds between 20Hz and 200Hz. The term “bass” refers to sounds that fall within this frequency range.

A subwoofer is composed of a speaker cabinet, which is often built of wood, a driver, which may or may not be equipped with an amplifier (amply), and ports or vents (vents). This port or vent is intended to eliminate sound distortion and unwanted noise.

An active subwoofer includes an amplifier. As a result, it may be able to operate without the need for an external power source. A passive subwoofer, on the other hand, lacks an amplifier. Subwoofer impedances typically range from 4 to 8.

PARAMAX Subwoofer

Subwoofer Functions

The subwoofer warms up the music, the bass is deeper and thicker for a more genuine sound, and the microphone is more sensitive and better.

Subwoofers also provide the benefit of additional power regulation that is consistent across the system. Music’s sound energy peaks at low frequencies and declines as frequency increases. As a result, we can see how crucial it is to use the subwoofer line to manage both the bass and the power.

The subwoofer plays an important role in transmitting all of the sound levels of the music being played, making the song loud and powerful. Because of the low-frequency range of 20 Hz – 200 Hz, the force is increased while remaining softer and deeper.

Subwoofers and speakers will usually work together to give you the best enjoyment

2. Subwoofer Components

A Basket

The basket’s primary duty is to hold all of the subwoofer’s components in place and to attach it to the cabinet with screws.

Because subwoofers generate a lot of heat, the basket is designed with side vents that allow heat to escape from the subwoofer’s components.

10inch Subwoofer Basket - SOLIDWORKS

Surround Dome

The next component is the arch. The arch is often comprised of rubber or sponge cushioning. The dome is a flexible spherical piece of material that connects the diaphragm to the basket. It also keeps the diaphragm centred to prevent any effect on the voice coil.

The arch is a one-of-a-kind feature. It is designed to withstand wide fluctuations. Massive bass effects are produced as the diaphragm goes far forward or backwards.

Because it must retain its original shape after strong hits, it is usually preferable to own a subwoofer with a dome made of a blend of synthetic materials.

Surround Dome

Diaphragm/Cone Membrane

The diaphragm is also an important part of the subwoofer. The diaphragm’s job is to vibrate the air to produce sound. Because it is the most important component, it must be correctly constructed to avoid flaws that will affect the entire speaker.

Furthermore, because subwoofers are designed to handle low-frequency sounds at high sound pressure levels (high-pitched noises), the diaphragm must be both robust and light. As a result, the diaphragm is frequently constructed of plastic, organic fibre, or metal.

Cone Membrane

Dust Cap

The dust cap is a little component attached to the membrane in the centre that keeps dust out of the speaker. Depending on the quality of the subwoofer, the dust cap may extend slightly from the centre or protrude into the cone.

Dust Cap


Another important component that determines subwoofer performance is the spider. Normally, the spider is connected to the voice coil at one end and the basket at the other. It is situated directly beneath the diaphragm.

The pleated design gives it the name “spider,” and it is made of a special material that has been coated with plastic to improve its rigidity and keep it strong.

1200w Rms 18 inch 114 mm Voice Coil Diameter Dual Spider Subwoofer

In a subwoofer, the spider performs two purposes. Its principal role is to monitor the up and down movement of the diaphragm while keeping the voice coil centred and in the magnetic area. The last task is to keep dust out of the voice coil or the magnetic zone where the voice coil moves up and down.

Tinsel Leads

The cabling that links the voice coil to the speaker ports is known as the voice coil wiring. They are generally flexible and highly resilient, which means they will not be destroyed by the diaphragm’s intense vibrations.

Subwoofer's Tinsel Leads

Voice Coil

The voice coil is the heart of the subwoofer. A thin copper wire is wrapped around a cylinder to create this gadget.

Current flows through the coil as the amplifier sends audio data to the subwoofer, creating a magnetic field that pulls and pushes the sound coil. Due to alternating currents, the voice coil swings up and down, producing sound.

Because the subwoofer generates a significant amount of heat when operating at maximum power. This will overheat the glue between the voice coil and the post, straining the wire.

Subwoofer's Voice Coil


The final component is the magnet. Many people assume that the larger the male foot, the better the sound quality of the subwoofer. This is not entirely right. Magnets vary in size due to the various manufacturing procedures used. An electric current is generally covered on top and bottom to help direct the magnetic field to the voice coil.

Subwoofer's magnet

3. Models of Subwoofers

Depending on the amount of available capacity

Based on their power, subwoofers are divided into two types: active subwoofers (electric subwoofers) and passive subwoofers (steam sub).

Active Subwoofer (electric sub)

An active subwoofer has an amplifier (amply) built-in to generate a bass signal. As a result, this type of subwoofer is frequently used in instances when the audio system’s amplifier and receiver do not meet the requirements for producing bass.

Power subwoofers have built-in power circuits, so you don’t need to connect them to an amplifier to use them; simply connect the audio signal to the input.

Passive Subwoofer (steam sub)

A passive subwoofer is a type of speaker that lacks an internal amplifier, necessitating the use of an external amplifier or more power to produce additional audio signals. While using steam speakers, you must prepare and connect them differently than when using electric speakers.

Active Subwoofer and Passive Subwoofer

Depending on the design

Based on their design, subwoofers are divided into three types: isostatic subwoofers, box-mounted subwoofers, and vented subwoofers.

Isometric shape subwoofer

The isometric subwoofer has a one-of-a-kind design with two bass speakers arranged symmetrically. Sound waves moved and collided as a result of the proper arrangement.

When a sound stream flows into a small space, it creates an impact that produces extremely strong bass, which is why high-quality subwoofers are commonly used in karaoke rooms, discos, and so on.

Isometric shape subwoofer

Subwoofer box

The box-mounted subwoofer works in the same way as other subwoofers. The speaker box is a metal block, a discrete box that is connected to the outside through a Woofer.

Subwoofer box

A ventilated port subwoofer

The cabinet of this type of speaker is distinctive in that it has a small hole in it that serves as powerful ventilation and ventilation. This vent creates more powerful basses, giving listeners a more pleasurable experience.

The vent can be installed either in front of or behind the speaker. The vent is typically placed in front of the speaker in a small, tight space.

A ventilated port subwoofer

4. How to Properly Install a Subwoofer for Best Effectiveness

Because a subwoofer is a piece of audio equipment that everyone needs for professional sound systems, you must have a thorough understanding of how to install it. We will supply you with more instructions on how to properly position the subwoofer to get the best sound out. Let’s work together to figure things out.

Determine the placement of the subwoofer

Because the subwoofer’s bass is not directional, positioning it anywhere in the listening area will not produce the same results. To make a difference in the bass performance of the speaker while it is running, you must choose the right subwoofer location. Numerous individuals have decided that putting the subwoofer in the corner of the wall will make the bass thicker and louder. However, putting the speaker in that location will result in a less firm and clear bass.

Select some of the best speaker locations, then play those bass-heavy sections again while adjusting the sub to other spots, using a test CD with lots of deep basses. The listening room is the optimum place for the speakers. This method, however, is a little more difficult due to the subwoofer’s weight and size. Yet, it benefits in subwoofer placement to reproduce the deepest bass while maintaining the balance of the bass and mid-bass regions.

Determine the placement of the subwoofer

Avoid positioning the subwoofer too far away from the main speaker, as this will make bringing the bass from the main speaker system difficult. Also, when locating the bass speaker, adjust the volume to find the place that produces the greatest bass while retaining clarity and detail.

Also, while positioning the subwoofer, various considerations must be taken, such as the issue of acoustic resonance. As a result, avoid positioning the subwoofer in places with large gaps or corners, as this will cause phase differences. When positioned near fragile objects, they easily rattle, affecting the speaker and causing a lot of noise, resulting in poor sound quality from the speaker.

The preceding observations demonstrate that the location of the subwoofer is crucial since it has a direct impact on sound quality. As a result, before determining where to place the speaker, undertake extensive research.

Installing the Most Powerful Subwoofer

Step 1: Generate an installation map 

Read the manufacturer’s instructions carefully before beginning installation to ensure that no improper procedure causes device damage. Normally, the speaker operates best when placed in a corner, 1.8m away from the walls. Also, consider whether to use the crossover on the subwoofer or the crossover on the receiver, as using the crossover will help to best combine a frequency range between the subwoofer and the full speaker.

Some subwoofers now incorporate a switch to enable or disable the crossover feature in the case of a receiver.

Generate an installation map 

Step 2: Connect the speaker cable

Before connecting, measure the required wire length from the receiver to the subwoofer and leave a duplicate. Connecting at the line level necessitates the use of a standard audio signal cable with RCA connectors on both ends. Connect the cable from the receiver’s subwoofer output to the subwoofer’s line-level output.

Connect the speaker cable

Step 3: Arrange

Put the subwoofer on its mat, but make sure the right side is facing the carpet to prevent damage from all sides. The driver can be positioned against the wall, but there must be at least 30cm between the driver and the wall.

Subwoofer install

Step 4: Connect

At this point, leave the system turned off and link the cords together. After connecting everything, set the crossover control to the maximum frequency, turn down the volume, and turn off the phase control.

Step 5: Customize

After connecting everything, turn it on and listen to the sound to see if it’s acceptable or whether the speaker placement is adequate; the sound should fill the entire theater room. You can evaluate the sound quality using a test CD or other applications. If you are still dissatisfied, please review the preceding connecting methods. Set the receiver to use two channels, then listen to music at a medium volume and turn up the subwoofer until the sound matches the speakers.

Step 6: Distinguish the frequencies

Lower the cut-off frequency control until the left and right speakers and subwoofer sound like various tones, then increase the control until the tones blend, the sound is consistent, and the sound is the best. Because small speakers have less bass than large speakers, you should turn it up to hear it.

Complete Subwoofer installation

Step 7: Mix everything together

For subwoofers that typically contain a switch to enable two-phase settings, varying between 0 and 180 degrees can assist you to determine which option provides stronger bass. If the sub tries to change the phase, turn it up till the bass is louder.

Step 8: Tweak the system

Because the crossings and the degree of control interact so much, you can repeat steps 5 and 7 until the frequencies are consistent. Pay great attention to the song to compensate for the loud bass.


A powered subwoofer has an amplifier and may be directly connected to a line-level audio output. Because a passive subwoofer does not have an amplifier, it must be powered by an external amplifier or receiver.

More subwoofers can be added to your audio system, but careful arrangement is essential to avoid phase cancellation and other issues. It is usually recommended to use identical subwoofers and to properly position them in the room.

A crossover is an electrical circuit that separates audio signals into multiple frequency bands. Subwoofers require a crossover to guarantee that only low-frequency noises are directed to the subwoofer and higher-frequency impulses are routed to the other speakers.

Subwoofer settings are frequently altered using controls on the subwoofer or the amplifier or receiver to which the subwoofer is connected. Volume, crossover frequency, phase, and equalization are all changeable factors.

Even if your speakers can reproduce low-frequency sounds, a subwoofer may enhance the overall audio experience by providing more powerful and dramatic bass response. Yet, whether or not you need a subwoofer is ultimately determined by your own preferences as well as the specific requirements of your audio system.

We’ve already talked about What Is A Subwoofer? How To Properly Install A Subwoofer. Casual Living USA hopes you enjoy your subwoofer listening experience.

Vincent Mason

Vincent Mason sells speaker and audio devices for home and small civil works and has 15 years of experience. He is a US-based expert. Vincent is a well-groomed, early-forties man. His warm, approachable nature helps him connect with consumers and develop enduring connections. Vincent is a good salesman who knows his products and consumers. He's good at matching products to customers' needs and budgets. Vincent spends his free time researching audio technologies and market trends. He loves music and attends concerts and festivals whenever possible.

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