Denon AVR-1803 Operating Instructions Manual

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ENGLISH30FL CSW FRFL CSW FRSL SRSBSL SRSBMultiple surround speakersMovie theater sound fieldListening room sound fieldIn this case it is important to achieve thesame sense of expansion as in a movietheater with the surround channels.To do so, in some cases the number ofsurround speakers is increased (to four oreight) or speakers with bipolar or dipolarproperties are used.• Other types of audio These signals are designed to recreate a 360° sound field using three to fivespeakers.In this case the speakers should surround the listener from all sides tocreate a uniform sound field from 360°. Ideally the surround speakersshould function as “point” sound sources in the same way as the frontspeakers.FL CSW FRSL SRThese two types of sources thus have different properties, and different speaker settings, particularly for thesurround speakers, are required in order to achieve the ideal sound.SL: Surround L channelSR: Surround R channelSB: Surround back channel (1 spkr or 2 spkrs)There are currently various types of multi-channel signals (signals or formats with more than two channels).2 Types of multi-channel signalsDolby Digital, Dolby Pro Logic, DTS, high definition 3-1 signals (Japan MUSE Hi-Vision audio), DVD-Audio,SACD (Super Audio CD), MPEG multi-channel audio, etc.“Source” here does not refer to the type of signal (format) but the recorded content. Sources can be dividedinto two major categories.Types of sources• Movie audio Signals created to be played in movie theaters. In general sound is recorded to be played inmovie theaters equipped with multiple surround speakers, regardless of the format (DolbyDigital, DTS, etc.).(For 6.1-channel system)18 ADDITIONAL INFORMATIONOptimum surround sound for different sourcesSurround back speakersA 6.1-channel system is a conventional 5.1-channel system to which the “surround back” (SB) channel hasbeen added. This makes it easy to achieve sound positioned directly behind the listener, something that waspreviously difficult with sources designed for conventional multi surround speakers. In addition, the acousticimage extending between the sides and the rear is narrowed, thus greatly improving the expression of thesurround signals for sounds moving from the sides to the back and from the front to the point directly behindthe listening position.FL CSW FR FL CSW FRSR chSL chSL ch SR chSB chChange of positioning and acoustic imagewith 5.1-channel systemsWith this set, speaker(s) for 1 or 2 channels are required to achieve a 6.1-channel system (DTS-ES, etc.).Adding these speakers, however, increases the surround effect not only with sources recorded in 6.1 channelsbut also with conventional 2- to 5.1-channel sources. All the Denon original surround modes (see page 23) arecompatible with 6.1-channel playback, so you can enjoy 6.1-channel sound with any signal source.Movement of acoustic image from SR to SLChange of positioning and acoustic imagewith 6.1-channel systemsMovement of acoustic image from SR to SB to SL2 Number of surround back speakersThough the surround back channel only consists of 1 channel of playback signals for 6.1-channel sources(DTS-ES, etc.), we recommend using two speakers. When using speakers with dipolar characteristics inparticular, it is essential to use two speakers.Using two speakers results in a smoother blend with the sound of the surround channels and better soundpositioning of the surround back channel when listening from a position other than the center.2 Placement of the surround left and right channels when using surround back speakersUsing 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 acousticimage from the front to the back. As shown on the diagram above, in a movie theater the surround signalsare also produced from diagonally in front of the listeners, creating an acoustic image as if the sound werefloating in space.To achieve these effects, we recommend placing the speakers for the surround left and right channelsslightly more towards the front than with conventional surround systems. Doing so sometimes increasesthe surround effect when playing conventional 5.1-channel sources in the 6.1 surround or DTS-ES Matrix 6.1mode. Check the surround effects of the various modes before selecting the surround mode.