Surround back speakers

The THX Surround EX format adds new “Surround Back” (SB) channels to the conventional 5.1-channel system. This makes it easy to achieve sound positioned directly behind the listener, something that was previously difficult with sources designed for conventional multi surround speakers. In addition, the acoustic image extending between the sides and the rear is narrowed, thus greatly improving the expression of the surround signals for sounds moving from the sides to the back and from the front to the point directly behind the listening position.

Change of positioning and acoustic image

with 5.1-channel systems

FL

SW

C

FR

SL ch

 

 

SR ch

Change of positioning and acoustic image

with THX Surround EX system

FL

SW

C

FR

SL ch

 

 

SR ch

 

 

SB ch

 

Movement of acoustic image from SR to SL

Movement of acoustic image from SR to SB to SL

Speaker(s) for one or two channels are required in order to achieve a THX Surround EX system with the AVR-4802. Adding these, however, allows you to achieve stronger surround effects not only with sources recorded in THX Surround EX, but also with conventional 2- to 5.1-channel sources. The WIDE SCREEN mode is a mode for achieving surround sound with up to 7.1 channels using surround back speakers, for sources recorded in conventional Dolby Surround as well as Dolby Digital 5.1-channel and DTS Surround 5.1-channel sources. Furthermore, all the Denon original surround modes (see page 52) are compatible with 7.1-channel playback, so you can enjoy 7.1-channel sound with any signal source.

2Number of surround back speakers

With THX Surround EX, the surround back channel consists of one channel of playback signals, but we recommend using two speakers. When using dipolar speakers in particular, it is essential to use two speakers.

Using two speakers results in a smoother blend with the sound of the surround channels and better sound positioning of the surround back channel when listening from a position other than the center.

2Placement of the surround left and right channels when using surround back speakers

Using surround back speakers greatly improves the positioning of the sound at the rear. Because of this, the surround left and right channels play an important role in achieving a smooth transition of the acoustic image from the front to the back. As shown on the diagram above, in a movie theater the surround signals are also produced from diagonally in front of the listeners, creating an acoustic image as if the sound were floating in space.

To achieve these effects, we recommend placing the speakers for the surround left and right channels slightly more towards the front than with conventional surround systems. Doing so sometimes increases the surround effect when playing conventional 5.1-channel sources in the THX Surround EX mode. Check the surround effects of the various modes before selecting the surround mode.

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Denon AVR-4802 manual Surround back speakers, Number of surround back speakers
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AVR-4802 specifications

The Denon AVR-4802 is a premium home theater receiver that has garnered a reputation for delivering exceptional audio and video performance. Launched as part of Denon's celebrated line of A/V receivers, the AVR-4802 exemplifies the brand's commitment to quality and innovation in the realm of home entertainment.

One of the key features of the AVR-4802 is its robust amplification capability. It provides a powerful 110 watts per channel, allowing users to enjoy a dynamic and impactful soundstage. The receiver is equipped with multiple channels, which facilitates a fully immersive surround sound experience, accommodating various speaker configurations, including traditional 5.1 and more advanced setups like 7.1 surround sound.

The AVR-4802 incorporates cutting-edge surround sound processing technologies, including Dolby Digital and DTS, ensuring high-fidelity audio reproduction for both movies and music. Additionally, it supports 24-bit/192kHz audio playback, which enhances the detail and clarity of sound, making it suitable for both casual listeners and audiophiles.

In terms of video capabilities, the AVR-4802 supports high-quality video formats, including progressive scan for smoother images, and it features multiple video inputs, including S-Video and composite connections. This versatility allows users to connect various devices, such as DVD players and gaming consoles, simplifying the integration of a comprehensive home theater system.

The receiver also comes with advanced DSP (Digital Signal Processing) algorithms that optimize audio output based on the environment, providing an improved listening experience regardless of the room's acoustics. This feature further enhances the AVR-4802's appeal to home theater enthusiasts looking for customizability.

Another outstanding characteristic of the AVR-4802 is its user-friendly interface, featuring a comprehensive on-screen display that simplifies setup and operation. It includes a remote control that offers convenient access to all functionalities, making navigation through various settings intuitive.

Additionally, the AVR-4802 is equipped with multiple digital and analog inputs, which provides flexibility in connecting other audio and video components. The receiver's build quality is also noteworthy, reflecting Denon's attention to detail, ensuring durability and performance.

Overall, the Denon AVR-4802 is a well-rounded A/V receiver that combines power, advanced technologies, and user-friendly features to create an ideal centerpiece for any home theater system, offering an unparalleled entertainment experience for users who appreciate high-quality sound and video.
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