How To Connect 2 Subwoofers To One Receiver

The magic of a home theater goes beyond the dazzling visuals that envelope its audience; it also lies in the ...

By Dewayne

The magic of a home theater goes beyond the dazzling visuals that envelope its audience; it also lies in the immersive audio experience that rumbles through the floor and reverberates around the room. Central to creating this aural treat is the strategic placement of sound equipment, particularly, the subwoofers within a home theater setup. The placement and volume of subwoofers can greatly influence the acoustic environment of your home theater, bringing you one step closer to achieving cinema-level audio experience.

The process of integrating multiple subwoofers into your home theater setup can be daunting, particularly if you’re a novice when it comes to audio equipment. However, armed with the necessary knowledge, one can improve the audio setup of any home theater with the correct positioning and interconnection of two subwoofers to a receiver. This article will provide an in-depth discussion about what a subwoofer is, why using two subwoofers can be beneficial, how to connect these two subwoofers to a receiver, and how to optimize the use of two subwoofers in your home theater.

If you feel overwhelmed by the many variables that come with setting up a home theater, fret not. This guide will address all your queries, breaking down complex jargon into understandable concepts, outlining step by step instructions, and providing tangible recommendations on how to maximize your home theater experience.

What Is A Subwoofer?

A subwoofer is a specialized speaker that’s built to reproduce low-frequency sounds. The name itself comes from the term ‘sub-bass’, which refers to sound frequencies that are below the range of normal speakers. The primary role of a subwoofer in your home theater setup is to deliver the deep, resonant bass that brings an extra dimension to your audio experience.

In a home theater system, you can immediately tell the difference a subwoofer makes. It is the key deliverer of the powerful, rumbling sounds that make a cinematic experience felt as well as heard. You’d be pressed to find a home theater setup without subwoofer included, as the impact they bring to audio quality is significant.

The fundamental concept behind a Subwoofer is simple; it completes your total sound experience. Being tailored to focus on only the lowest of frequencies, it ensures that these parts of any soundtrack are not skimmed over or distorted by the main speakers which have to work on the bulk of the sound frequencies.

Given this, it’s clear that the subwoofer plays a crucial role in any home theater. It ensures a richer, more immersive audio experience, supplying those remarkably deep bass frequencies that standard speakers often fail to reproduce faithfully.

Why Use Two Subwoofers?

Now that we understand the importance of a subwoofer in a home theater setup, you might question why there’s a need for two. Using two subwoofers instead of one has multiple benefits, chief among which is the improved distribution of bass throughout the room. Having one subwoofer often results in hot spots where the bass is intense, and cold spots where it’s hardly felt. Two subwoofers can solve this problem.

Another reason to use two subwoofers is the extra volume. More volume does not mean louder; in this case, it means a wider range of bass. Two subwoofers can produce a greater range of low-frequency sounds than one. This is particularly critical in larger rooms where a single subwoofer may struggle to adequately cover the entire area.

Using two subwoofers not only enhances sound quality by filling in acoustic gaps, but it also improves the audio “sweet spot” within your home theater. This ensures every viewer in the room can equally enjoy the superb audio quality, irrespective of their seating position.

Lastly, two subwoofers offer increased headroom, meaning they operate at a lower output level for a given volume setup. This results in less distortion and a more accurate depiction of the recorded material, which is particularly beneficial for your home theater setup.

What Is A Receiver?

Before moving on to describe the type of receiver you’ll need, it is vital to understand what a receiver is and its role in a home theater system. A receiver serves as the control hub for your home theater setup. It sources signals from multiple devices, decodes them, amplifies the signals and sends them to your various speakers.

The terminology often used interchangeably are ‘amplifiers’ and ‘receivers.’ While they do have overlap in terms of function, they are not the same. A receiver is essentially an amplifier that also includes a radio-tuner and acts as an interface between your sources and your speakers.

Most importantly for our purposes, a receiver serves as the point of connection for your subwoofers. It is the device that sends the low-frequency sounds to the subwoofers and allows for their volume and other settings to be controlled.

Receivers play a crucial role in your home theater setup. They handle the important task of decoding the audio signals from your various devices and amplifying them correctly to pair with your subwoofers and other speakers in the home theater.

What Type Of Receiver Do I Need?

Determining the right receiver for your home theater system depends on several factors – the number of input devices you intend to connect, your choice of audio format, and the number of speakers or subwoofers in your setup. For a dual-subwoofer setup, you would need a receiver that could support multiple subwoofer outputs, commonly referred to as ‘.2’ in home theater jargon.

More upscale models of receivers come with advanced features like pre-outs which allow you to connect an external amplifier or an extra subwoofer to boost your home theater’s sound quality. If this is something you’re interested in exploring, you might want to consider a receiver with this feature.

The market today offers a wide range of receivers that cater to nearly every need, from those with basic functionality to high-end options with advanced features such as wireless connectivity, extensive input/output options, and compatibility with different audio formats.

Remember, no matter which receiver you choose, your ultimate aim should be to maximize the overall sound experience of your home theater. The right receiver should seamlessly blend with your setup, enhance your audio quality, and offer enough flexibility for future upgrades or additions.

How To Choose The Right Subwoofers?

There are a few key factors to consider when purchasing a subwoofer for your home theater. These include the size of the woofer, its power handling capacity, and its frequency response. Additionally, the size and acoustic characteristics of your room will significantly influence your choice.

The size of your room is an essential factor when selecting a subwoofer. Larger rooms will require bigger subwoofers to adequately fill the space with sound. You should also factor in the number of seats in your home theater. The greater the amount of seating, the more challenging it will be to evenly distribute sound, hence the need for multiple or larger subwoofers.

The power handling capacity of the subwoofer refers to how much power it can effectively use without getting damaged. A subwoofer that can handle more power will be able to produce louder sounds. If you’re going for a double subwoofer setup, ensure both have similar power handling capacities to prevent overpowering or damaging one another.

The frequency response refers to the range of frequencies that the subwoofer can reproduce accurately. A wider frequency range ensures a more accurate, immersive sound experience. You should aim for a subwoofer with a wide frequency response range for the optimal sound experience in your home theater.

One final consideration when choosing subwoofers for your home theater is whether they are front-firing or down-firing. This refers to where the driver, the component of the subwoofer responsible for creating sound, is located on the speaker. Front-firing subwoofers emit sound from the side or front and are best placed near a wall or corner. Down-firing subwoofers emit sound downwards and work well when placed near the center of the room. The choice between these two types of subwoofers largely depends on your room’s acoustics and layout.

How Should I Connect My 2 Subwoofers?

The specific steps for connecting your two subwoofers will depend on the type of receiver and subwoofers that you have. As a caveat, you should always consult your owner’s manual for both the receiver and the subwoofers, as they often provide specific, detailed instructions. However, outlined below are some general steps for how to connect two subwoofers to one receiver.

Start by inspecting your receiver. Ensure it has two separate subwoofer outputs. If not, you may need to use an RCA Y-splitter to connect the subwoofers to the receiver. The Y-splitter connects to the LFE (Low Frequency Effects) subwoofer output on your receiver and splits the signal to the two subwoofers.

Next, run an RCA cable from each subwoofer output on your receiver to each respective subwoofer. Then, select the right cross-over frequency on your receiver, typically around 80Hz. This is the frequency level where your subwoofers will begin to produce sound instead of your speakers.

Lastly, calibrate your receiver for sound levels. Most receivers feature built-in auto-calibration systems that, together with an included microphone, can help you set up your system correctly. Make sure you run this calibration after you’ve connected and properly placed your subwoofers in the room.

Remember to power your subwoofers on and adjust their volume levels appropriately. The goal here isn’t to overpower your other speakers but rather to complement them. Each subwoofer should add depth and presence to the overall sound without dominating it.

What Are The Benefits Of Two Subwoofers?

Adding a second subwoofer to your home theater setup is a simple enhancement that can yield dramatic results. The primary benefit is more consistent bass response over a wider area. As discussed earlier, with just one subwoofer, there are usually spots in a room with booming bass and others with almost none. Adding a second subwoofer can even out these “bass dead zones,” resulting in a more consistent and enjoyable sound.

The volume of your bass also increases with the introduction of a second subwoofer. While the bump in decibels isn’t twice as loud, it typically ranges from a 3-decibel to 6-decibel increase. This added bass doesn’t reach the point of discomfort but enhances the richness of sound in your home theater.

Having two subwoofers also allows for a deeper bass extension. This means you not only get loud bass from your home theater but bass that you feel within your body. The sensation of sound waves vibrating through your body further adds to the immersive experience.

Lastly, running two subwoofers results in lesser distortion as each subwoofer doesn’t have to work as hard at higher volumes to produce the same amount of bass. With two subwoofers sharing the load, they run more efficiently, hence maintaining sound quality at louder volumes.

Any Specific Connectivity Precautions?

While setting up your home theater, it’s always essential to take certain precautions to prevent damage or injury. Caution while handling the connectivity of your subwoofers and other components is no exception.

Ensure your subwoofers are switched off before connecting them to the receiver. This can prevent potential damage from sudden power surges or noises once you plug in your cables.

When connecting the subwoofers to your receiver, make sure the cables are firmly plugged in, ensuring a secure connection. Loose connections can reduce sound quality or even damage your equipment due to power discrepancies.

Moreover, carefully select the location for your subwoofers. Keep them a safe distance away from sensitive electronics that could potentially be affected by their strong magnetic fields. Also, consider their proximity to walls and corners, as these can influence how the sound waves are distributed around your room.

Lastly, always pay attention to the compatibility of your equipment. Not all subwoofers match well with all receivers, and mismatched gear can compromise the performance quality of your home theater.

Can You Mix And Match Different Brands?

When it comes to home theater setup, you might wonder if you can mix and match different brands of subwoofers. The simple answer is yes, but it’s often not recommended.

Although pairing two different brands of subwoofers can technically work, each brand and model has its unique sound characteristics. Hence, it might result in an uneven sound distribution or audio quality across your home theater, especially if one subwoofer significantly outperforms the other.

Additionally, different brands may have different output levels, meaning they might play at different volumes even when set to the same level on your receiver. This could lead to one subwoofer overdriving the other, causing undue wear or even damage.

If absolute audio perfection is your aim, it’s advisable to stick to the same brand and model of subwoofers for the most cohesive sound stage and the smoothest blending of sounds.

Optimizing 2 Subwoofers

Having two subwoofers for your home theater is one thing. Optimizing their performance for the best possible sound experience is another crucial aspect. Here are a few tips on how to get the most out of your dual-subwoofer setup.

First, consider the placement of your subwoofers. Where you place your subwoofers in your room can dramatically affect how their sound distributes. For optimal results, they should be evenly spread out, ideally across from each other in diagonally opposing corners.

Next comes the calibration of your subwoofers. This has to do with the crossover frequency of your subwoofers and other speakers. The crossover frequency represents the point where sound transitions from your general speakers to subwoofers. In many home theater setups, this value is around 80Hz, but you should let your ears be the ultimate judge.

Additionally, determining the phase of your subwoofers can also improve performance. The phase control in your subwoofers allows the bass sounds to match up with the rest of your speakers, adding coherence to the overall sound image.

Finally, remember to carefully calibrate the volume of your subwoofers. Although the ultimate goal is to let them provide deep bass sounds, they shouldn’t overpower your main speakers but rather complement them, creating a balanced and sonically pleasing audio output.


A well-set-up home theater boasts of not just picture highs, but also auditory peaks. Central to this auditory experience is a powerful, responsive subwoofer setup. Dual subwoofers make the resonant basslines and thrilling explosions in movies more than just sounds; they create sensory tremors that immerse you right into the action on screen – the essence of an authentic cinematic experience.

Connecting two subwoofers to one receiver might seem quite the uphill task, but the benefits reaped are well worth it. This depth of guide walks you through the multitude of considerations to make and steps to take when setting up your dual-subwoofer home theater system.

Appropriate calibration, ample knowledge of audio equipment, and careful placement can enrich your cinematic venture, making every movie night an extraordinary, visceral adventure. With these guidelines in mind, you can ease the installation process while ensuring the optimal performance of your home theater’s sound system.

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