TV soundbar channel systems

Excellent sound is crucial for an immersive TV experience. Whilst modern televisions deliver impressive picture quality, the full potential of the audio experience is often realised only when complemented by a suitable audio system. Soundbars have established themselves as a popular solution here, offering not only a space-saving design but also a significantly improved sound experience compared to the TV’s built-in speakers. A key feature that significantly determines the performance and functionality of a soundbar is its channel system. In this comprehensive guide, we delve deep into the world of soundbar channel systems and highlight the options available for a personalised home cinema setup.

What are soundbar channel systems?

Before we look at the different configurations, it is important to understand what a channel system actually means in the context of a soundbar. Essentially, the number of channels describes how many independent audio channels a soundbar can process and reproduce. Each channel represents a specific sound area, contributing to a spatial and detailed sound experience. Choosing the right channel system significantly influences the immersion, the clarity of dialogue and the dynamics of films, series and music. It is not just about turning the sound up, but about shaping it in such a way that it surrounds the listener and allows them to immerse themselves in the action. A well-balanced channel system can make you feel as though you are right in the middle of the film or in a concert hall.

Soundbar basics: The importance of channels

Each number in a soundbar’s channel system indicates a specific type of speaker or sound range that it covers. This structure enables a nuanced listening experience. Understanding the meaning of these numbers will help you choose the system that best suits your needs.

The first number: Horizontal sound

The first number in a soundbar’s channel system describes the number of speakers responsible for horizontal sound reproduction. These are typically the front speakers, which are responsible for the wide soundstage and reproduce sounds from the left, right and, in compatible systems, also from the centre. These channels are crucial for the precise positioning of dialogue and sound effects within the room. They form the acoustic stage and ensure that voices are clear and intelligible, standing out from background noise. Whether it’s a rustling leaf in the forest or the roar of an aeroplane, horizontal sound reproduction ensures a realistic and detailed presentation.

The second digit: the bass expert, the subwoofer

The second digit refers to the subwoofer, which is responsible for reproducing deep, powerful bass. A separate subwoofer often offers significant advantages here over integrated bass solutions within the soundbar itself. It can produce deeper and more powerful bass without overloading the soundbar’s other speakers. This results in a noticeably more dynamic and immersive sound experience, particularly for films with explosions, music with rich bass, or video games. Many modern soundbars offer wireless subwoofers, which allow for flexible placement in the room without the need to lay unsightly cables. This not only enhances the aesthetics but can also optimise sound quality, as the subwoofer can be positioned in the ideal spot for bass reproduction.

The third digit: Vertical sound, Dolby Atmos & DTS:X

The third digit in the channel system, where applicable, indicates ‘Height’ channels, which are responsible for reproducing vertical sound, as enabled by formats such as Dolby Atmos and DTS:X. These audio technologies are object-based, meaning that sound objects can be freely placed and moved within a three-dimensional space. Soundbars with these channels feature upward-firing speakers that project sound towards the ceiling, from where it is then reflected, creating the impression that the sound is coming from above. This creates an impressive 3D sound experience where, for example, you feel as though a helicopter is flying overhead or rain is falling from the ceiling. This is a crucial step towards truly immersive surround sound.

An overview of the most popular soundbar channel systems

There is a wide variety of soundbar channel systems to suit different needs and budgets. Here is a detailed look at the most common configurations and their specific advantages for various usage scenarios.

2.0 soundbar: The clear entry point to enhanced TV audio

A 2.0 soundbar is the simplest channel system and consists of two channels: a left and a right speaker. This type of soundbar is ideal for those who want a basic but noticeable improvement in sound quality compared to the TV’s built-in speakers. It is characterised by clear speech reproduction and is often very compact and easy to integrate. A 2.0 soundbar is a good choice for smaller rooms or as an upgrade for everyday TV viewing.

2.1 soundbar: Adding depth to the sound experience

The 2.1 soundbar expands the 2.0 system with a separate subwoofer. This configuration delivers noticeably richer and deeper bass, making films, music and games feel significantly more dynamic. The upgrade to an external subwoofer is particularly recommended for music lovers and fans of action films, as it adds more volume and impact to the sound.

3.0 Soundbar: Focus on dialogue

A 3.0 soundbar adds a dedicated centre channel to the two front channels. This centre channel is of great importance, as it is specifically responsible for reproducing dialogue. The result is outstanding speech intelligibility, even in action-packed scenes or films with complex soundtracks. For news programmes, talk shows and dialogue-heavy films, a 3.0 soundbar offers a clear advantage.

3.1 Soundbar: Full sound with speech clarity

The 3.1 soundbar combines the benefits of the centre channel from the 3.0 configuration with a separate subwoofer. This results in a balanced sound experience that offers both excellent speech clarity and powerful bass. It is a very popular option for a wide range of content and offers a good balance between performance and space requirements.

4.0 soundbar: More space for your listening experience

A 4.0 soundbar begins to create a wider soundstage by using four channels. These can be front-left, front-right and additional side channels that expand the surround sound. This configuration creates a more immersive feeling and paves the way for a more authentic surround sound experience, even though it still does not include a subwoofer.

4.1 Soundbar: Spatial sound with impact

The 4.1 soundbar is an extension of the 4.0 configuration, adding a subwoofer. This means you get a wide soundstage with additional surround channels, whilst also enjoying the powerful bass of the subwoofer. This combination provides greater dynamics and depth within the wide soundstage and is a good step towards a fuller surround sound.

5.0 Soundbar: The first taste of surround sound

A 5.0 soundbar typically integrates front, centre and surround channels into a single soundbar. This is often achieved through virtual surround technologies or integrated side speakers, which cleverly distribute the sound throughout the room to create a surround sound experience, even without separate rear speakers. This offers a good introduction to the world of surround sound with a single, compact unit.

5.1 soundbar: The classic choice for a true home cinema experience

The 5.1 soundbar is often the ‘happy medium’ for home cinema enthusiasts. It comprises front, centre and surround channels, as well as a separate subwoofer. This is often achieved using a soundbar with rear speakers that are connected wirelessly to the soundbar. This enables genuine, discrete surround sound, as the surround effects come from behind, creating a truly immersive experience.

5.1.2 Soundbar: Your gateway to three-dimensional sound

The 5.1.2 soundbar marks the entry point into three-dimensional sound. It builds on a 5.1 system and adds two ‘height’ channels. These channels, often in the form of upward-firing speakers within the soundbar itself, enable the playback of audio formats such as Dolby Atmos and DTS:X. As a result, the sound appears to come not only from the front and sides, but also from above, creating an impressive sense of being right in the middle of the action.

7.1 soundbar: Maximum horizontal immersion

A 7.1 soundbar expands the surround channels for even more precise sound placement in the horizontal plane. This is achieved through additional side or rear channels, which make the soundstage even more detailed and enveloping. It is ideal for larger rooms and discerning home cinema enthusiasts who want maximum horizontal immersion.

7.1.2 Soundbar: Impressive sound from all directions

The 7.1.2 soundbar combines the comprehensive 7.1 system for horizontal sound with two additional height channels. This offers a truly all-encompassing 3D sound experience, where the sound surrounds the listener not only from all sides, but also from above. It is a major step towards a cinema-quality sound experience at home.

7.1.4 Soundbar: The ultimate soundbar home cinema experience

The 7.1.4 soundbar represents the current pinnacle of the soundbar segment. It offers a complete 7.1 system for horizontal sound and expands this with four height channels. These additional height channels enable an even more precise and room-filling vertical sound reproduction, resulting in a virtually perfect immersive sound experience and giving the feeling of truly being at the centre of the action.

Special soundbar designs: bespoke solutions for your home

In addition to the standard channel systems, there are also special soundbar designs that are optimised for specific needs and offer unique advantages.

All-in-one soundbar: Compact and powerful

An all-in-one soundbar is characterised by the fact that all components, including the speakers for the various channels and sometimes even a subwoofer, are housed in a single enclosure. This design is ideal for anyone looking for a space-saving solution and preferring a minimalist design. Advanced audio technologies and digital signal processing now make it possible to produce impressive, room-filling sound even from compact all-in-one soundbars, often with virtual surround effects that significantly enhance the listening experience. They are perfect for smaller living rooms or bedrooms where space is limited but improved TV sound is desired.

Sound deck: The sturdy base for your TV

A sound deck, also known as a TV base or sound platform, is a special type of soundbar designed so that the TV can be placed directly on top of it. These devices are often more robust and, due to their larger cabinet volume, usually feature larger speakers and built-in subwoofers. This allows them to produce a particularly rich and deep sound without the need for an external subwoofer. Sound decks are an excellent option for anyone looking for a discreet solution that blends seamlessly into the living space whilst delivering powerful audio performance. They eliminate the need to set up separate speakers or an additional subwoofer, which is particularly advantageous in smaller rooms.