4ENGLISHo!0!1!2!3!4!5!6qw e r t uy io!0!1!2!3!4!5!6!7!8Front Panel5 PART NAMES AND FUNCTIONS• For details on the functions of these parts, refer to the pages given in parentheses ( ).q Power operation switch .................................(19)w Headphones jack (PHONES) ....................(21, 31)e SURROUND BACK indicator ..........................(23)r INPUT MODE indicator ..................................(19)t STANDBY indicatory Displayu FUNCTION/SELECT knob ........................(19, 20)i MASTER VOLUME control ............................(20)o TUNING UP/DOWN buttons ..........................(32)!0 BAND button ..................................................(32)!1 TONE CONTROL button ................................(21)!2 STATUS button ...............................................(22)!3 SURROUND MODE button............................(29)!4 DOLBY/DTS SURROUND button ..........(23 ~ 26)!5 DIRECT/STEREO button.................................(21)!6 5CH/6CH STEREO button ..............................(28)!7 Power operation indicator ..............................(19)!8 Remote control sensor(REMOTE SENSOR) .......................................(10)4 FEATURES1. Dolby Virtual Speaker compatibilityThe AVR-550SD is equipped with power amplifiersthat make it compatible with new Dolby VirtualSpeaker technology for recreating a 5.1-channelenvironment virtually using a 2-channelconfiguration. (Dolby Virtual Speaker is anproprietary technology of Dolby Laboratories.) Ahigh performance digital signal processor enablesplayback of Dolby Digital and DTS multi-channelsurround signals in the Dolby Virtual Speaker mode.Surround sound can be achieved with the DolbyVirtual Speaker mode for CDs and other 2-channelsources in combination with the Dolby Pro Logic IIdecoder.2. Dolby Digital EX decoder systemDolby Digital EX is a 6.1-channel surround formatproposed by Dolby Laboratories that allows users toenjoy in their homes the “DOLBY DIGITALSURROUND EX” audio format jointly developed byDolby Laboratories and Lucas Films and first usedfor the movie “Star Wars Episode 1 – PhantomMenace”.The 6.1 channels of sound, including surround backchannels, provide improved sound positioning andexpression of space.3. Dolby Pro Logic IIx compatibilityDolby Pro Logic IIx furthers the matrix decordingtechnology of Dolby Pro Logic II to decode audiosignals recorded on two channels into up to 7.1playback channels, including the surround backchannel. Dolby Pro Logic IIx also allows 5.1-channelsources to be played in up to 7.1 channels.The mode can be selected according to the source.The Music mode is best suited for playingmusic,the Cinema mode for playing movies, and theGame mode for playing games. The Game modecan only be used with 2-channel audio sources.4. Dolby Pro Logic II Game mode compatibilityIn addition to the previously offered Music andCinema modes, the AVR-550SD also offers a Gamemode optimum for games.5. DTS-ES Extended Surround and DTS Neo:6The AVR-550SD is compatible with DTS-ESExtended Surround, a new multi-channel formatdeveloped by Digital Theater Systems Inc.The AVR-550SD is also compatible with DTS Neo:6,a surround mode allowing 6.1-channel playback ofregular stereo sources.6. DTS 96/24 compatibilityThe AVR-550SD can be decoded with sourcesrecorded in DTS 96/24, a new multi-channel digitalsignal format developed by Digital TheaterSystems Inc.DTS 96/24 sources can be played in the multi-channel mode on the AVR-550SD with high soundquality of 96 kHz/24 bits or 88.2 kHz/24 bits.7. On Screen DiaplayTroublesome operations such as adjusting thedelay time and other parameters according to thelistening environment are greatly simplified. Thevarious parameters can be set simply by selectingthe graphic displayed on the monitor screenaccording to the listening room’s systemenvironment.8. Video Conversion FunctionThe AVR-550SD is equipped with a function forconverting the signals input to the video inputconnector and S-Video input connector. With thisfunction, the AVR-550SD’s monitor out connectorand the monitor (TV) can be connected with videopin-plug cords or an S-Video connection cord.9. Dolby DigitalUsing advanced digital processing algorithms,Dolby Digital provides up to 5.1 channels of wide-range, high fidelity surround sound. Dolby Digital isthe default digital audio delivery system for NorthAmerican DVD and DTV.10.DTS (Digital Theater Systems)DTS provides up to 5.1 channels of wide-range,high fidelity surround sound, from sources such aslaser disc, DVD and specially-encoded music discs.11.Component Video SwitchingIn addition to composite video and “S” videoswitching, the AVR-550SD provides 2 sets ofcomponent video (Y, P B /C B , P R /C R ) inputsassignable, and one set of component videooutputs to the television, for superior picture quality.12.Auto Surround ModeThis function stores the surround mode last usedfor an input signal in the memory and automaticallysets that surround mode the next time that signalis input.