What is a subwoofer? Classification and installation of subwoofers for the best sound

Subwoofers, or subwoofers, are indispensable speakers in today’s professional sound systems. However, many people do not know the use and purpose of this type of speaker. Let’s find out what is a subwoofer with Tnhelearning.edu.vn? How to install the subwoofer for the best sound in the following article!

What is a subwoofer? Structure of the subwoofer

Subwoofer belongs to the subwoofer line, this speaker line is manufactured with the aim of creating the lowest frequency from which listeners can hear sweet, loving sound with a distinctive design. The subwoofer has a separate operation with the function of creating sound at low frequencies from 20 – 200Hz (bass), the sound will produce powerful quality.

When used correctly, this subwoofer integrated with the sound system will improve the quality of the sound system. Depth and width give a better soundstage and can reduce heavy sounds.

The subwoofer consists of 3 main parts: the speaker cabinet, the speaker core, and the connection wire. In the speaker core, many woofers are connected together to form a subwoofer, which is placed in the cabinet and is made of high-quality wood with extremely good resistance.

Speakers have a fairly diverse design, depending on the type of speaker, there will be different materials.

Uses of subwoofers

With the popularity in theater, stage and home karaoke sound systems, these speakers are responsible for different audio channels: center channel, surround effect channel, etc., the use of repeater speakers. Creating bass in the sound system is essential.

The subwoofer will support the bass, the sound will be warmer , the bass will be deeper and thicker to make the sound more realistic , the microphone will be more sensitive and better.

In particular, the bass is always the best sound in the music sound system, the subwoofer plays an important role in helping to fully convey all the sound levels of the music being played, making the music strong. stronger, more powerful, but softer and more profound thanks to the low frequency from 20 Hz – 200 Hz.

The main use of the subwoofer is mainly to fully exploit the uses and applications of other sound systems. Dedicated subwoofer for playing in the low frequencies needed for a quality orchestra.

Sub classifier (subwoofer)

Based on speaker power

Subwoofers are divided into 2 types based on speaker power: active sub (electric sub) and passive sub (steam sub).

• Active subwoofer (electric sub):

Active subwoofer is an integrated type that connects to a separate amp system inside to create a bass signal. People often use subwoofers in cases where the amplifier and receiver in the sound system do not meet the conditions to produce bass.

The special thing is that you can connect the active subwoofer to the audio system without the need for cables.

Power subwoofers are manufactured and designed with built-in power circuits, you do not need to connect them to the amplifier, just connect the audio signal to the input to be able to use it.

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• Passive subwoofer – sub slightly:

A passive subwoofer is a non-integrated speaker connected to the internal amp system, which requires an additional separate amplifier or accompanying power to provide additional audio signals. When using steam speakers, you need to prepare and connect more sophisticated than electric speakers.

Based on design

Based on the design of the subwoofer, there are 3 main types: isostatic sub, box-mounted sub, and vented sub.

• Isometric subwoofer:

This isostatic speaker has a special design with 2 bass speakers arranged in a symmetrical position. With the right layout ability, sound waves are created to move and collide with each other. When the sound stream moves in a narrow space, it creates an impact that creates extremely strong bass, so sub-woofers are often used in karaoke spaces, discos, etc.

Subwoofer in box

For this speaker line is not too different from other subwoofer lines. The speaker is designed with a speaker box that is a metal block, discreet box, connected with Woofer to connect to the outside.

Subwoofer with vents

This speaker series is special because the cabinet of the speaker has a small hole, the function of this hole is for strong ventilation and ventilation. It is the venting that creates more powerful bass, giving listeners a more wonderful feeling. With this vent can be placed in front or behind the speaker.

For subwoofers with vents arranged in narrow, small spaces, the vents are usually located in front of the speaker.

Tips for choosing the right subwoofer

Choose the right speaker size

The choice of driver size will reflect the quality of the depth that the bass comes out. If you use it to watch movies, you should prioritize choosing a speaker with a size of over 15 inches . The bass will be pushed down so when listening to music you will not hear the bass.

If you want to buy speakers for family karaoke or business karaoke with an average room area, you should choose a speaker with a size of 10-12 inches .

Ensures the harmony of the subwoofer and the entire system

You should check the harmony of the subwoofer with other speakers in the system in the karaoke system in the family to avoid waste, not promoting the subwoofer.

For example: Subwoofer has a frequency range of 40Hz and your speaker system only has a frequency range of 45Hz, which will waste the effect of the subwoofer. However, if you use speakers with a frequency range of 65Hz, the sound system will be different.

Buy a complete speaker system from one manufacturer

When you buy a full set of speaker systems from one manufacturer, it will definitely create a subwoofer harmony with other sound systems, which can easily interact with each other.

If you choose, you should consider choosing speakers according to the subwoofer. If you use a slightly sub-woofer, you should pay more attention to the power of the amp and should choose the power of the amp to be larger than the power of the subwoofer.

Thus, it will ensure that the speaker’s operating system is uniform, creating round, full and clear bass. In case, you have no experience in buying a subwoofer, you should choose an electric sub that is easy to achieve when used.

How to install subwoofer for the best sound?

Speaker installation location

The purpose of the subwoofer is so that listeners can have a fuller bass, so you should find a position so that the bass of the speaker matches and harmonizes with other sound systems, especially the speakers. You should place it about 30cm to 40cm from the ground because such a height can promote the capabilities of the speaker.

You should place the woofer not too far from the left and right speakers. With subwoofers with a diameter of less than 20cm, often chosen to be placed near the main speaker with a distance of 0.9 – 1.2m, they can work most effectively.

If you place it too far from the main speaker, the bass will not be effective, resulting in a discrete and disconnected sound.

When looking for a place to place the subwoofer, you should turn the volume up to make it easier to find where the bass is big, but the remaining bands are still rich in detail. Because if the installation is not correct, the sound will become heavy and awkward.

Instructions for connecting subwoofers for sound systems

Step 1: Build the installation diagram

Before installation, you should carefully read the manufacturer’s instructions, to ensure that there is no wrong procedure, causing damage to the device. You should consider whether to use the speaker’s crossover or the receiver’s crossover, because when you use the crossover, it will help to combine a frequency range between the subwoofer and the karaoke speaker, in the best way.

Step 2: Connect the speaker wire

Before connecting, measure the necessary wire length from the receiver to the subwoofer and remember to leave a duplicate . Because if you connect by line-level, you will need a standard Audio signal cable with RCA jacks on each end. Connect the wire from the receiver’s subwoofer output to the subwoofer’s line-level output.

In addition, if you like to use Speaker-level, you must use a lot of speaker wire, especially when the sub is far from the speaker. You then need to run the wires from the receiver’s left/right channel to the sub and from there to the speakers.

Step 3: Connect and customize

After installation, turn on the sound system and start customizing to hear if the sound is okay, or see if the speaker placement is reasonable, the sound evenly covers the theater space.

However, if the manufacturer has instructions that suggest you should install it first, then follow it. Plug in the power cord, make sure the volume on the receiver is all the way down, then turn on the system and subwoofer.

3. How to properly calibrate the subwoofer for good sound

For the line of electric subwoofers, you can easily see the volume control button right on the speaker. When adjusting the subwoofer will be adjusted directly on the speaker, we can completely do it on each button on the subwoofer as follows:

• Volume knob:

The Volume button is considered the easiest to adjust, you just need to turn the volume up or down so that the bass you hear is smaller than the music. You should slowly adjust the music to your ears.

Of course, the volume knob is only a small part of the contribution to the sound quality you are listening to because it also depends on the quality of the Sub speaker of each brand and how you control its functions as well as you use it. Sub speaker for the purpose of singing karaoke, listening to music or watching movies as well as how it overall coordinates the entire set that you are using.

• LPF frequency cut-off button:

The sound you often hear is a collection of a range of sounds with a frequency of 20Hz to 20kHz, the sound of the woofer possesses a low frequency range.

The LPF button has the function of clipping audio frequencies about 30 – 150kHz. The negative part of the LPF frequency is used to compensate for the missing parts that the speakers do not perform well, thereby helping you to have quality sound solutions.

To adjust the LPF frequency button, you should first read the parameters of the main speaker pair in the system. Specifically, your speakers have a low bass frequency of about 80Hz, you should adjust the LPF button slowly to 80Hz frequency clockwise.

• Phase adjustment button:

The Phase button has a phase adjustment function, when adjusting this button, you no longer have to worry about the phase difference when using the speaker.

It sucks when the main speaker and subwoofer don’t sound at the same time, so you should adjust the phase from 0 – 180 degrees and play a music with a lot of bass if you can hear a lot of bass in that track. is success.

Phase adjustment sounds simple, but actually it takes patience to find the right phase of the two speakers.

Hope the article has brought you useful information and how to install Sub speakers. Leave a comment below the article to share with us your questions or experiences when using this type of speaker!