Surroundsoundmodescont.

ADTStechnologywhichisabletorecreate6channel(LeftFront,RightFront, Centre,LeftSurround,RightSurround,SurroundBack)surroundsoundfrom suitable analogue matrix encoded stereo source material. DTS Neo:6 material can be played back by normal Stereo equipment (as Stereo) or decoded into 7.1 by sending the Surround Back decode to the both the SurroundBackLeftandRightspeakers(formingtwomonoBackSurrounds).

Note: Neo:6 does not include a Low Frequency Effects channel for the Subwoofer, but the 551R can create a Subwoofer output via Bass management. Refer to the ‘Tone/Sub/LFE configuration’ section in the ‘Operatinginstructions’partofthismanual.

A DTS technology that provides 5.1 channels of 96kHz / 24bit audio (along withvideoifrequired)onDVD-VideoandDVD-Audio(videozone)discs(when suitably encoded in DTS 96/24). DVD players which allow 'DTS digital out' pass the DTS 96/24 bitstream over S/P DIF or HDMI for decoding in the 551R.

DSPmodes

These modes allow a surround-sound experience from source material that has no encoding at all. The surround sound effect is achieved by Digital SignalProcessingoftheAnalogueorDigitalstereosourceused.Fivemodes arepossible:Movie,Music,Room,TheatreandHall.

Stereo/Stereo+Sub

OnlytheFrontLeftandFrontRightspeakers(andsubwooferifselected)have outputinthismode.Ifananaloguesourceisselecteditwillbeconvertedto digital via 24 bit A/D converters to allow digital domain sub creation and bass/treblecontrols.

Ifadigitalsourceisselectedthe551RwillbeprocessingeitherLPCMstereo (fromthedigitaloutputsofaCDplayerforinstance)oraStereodownmixof DDorDTSmaterial(fromthedigitaloutputofaDVDplayerforinstance).

Othermodes

AnalogueStereoDirect

Selects the analogue inputs for the current source directly with no A/D conversion, DSP processing, Bass/Treble or subwoofer channel active. Provides the very best fidelity for analogue Hi-Fi source equipment. In this modethe551RisactingjustlikeanormalHi-Fiintegratedamplifier.

MultiChannelPCM

Some playback devices (in particular Blu-ray players) are able to decode some of the above formats themselves internally and then output the decodedaudioasMultiChannelPCMtothe551R.InadditionBlu-raydisks can support native unencoded Multi Channel PCM soundtracks (of up to 8 channels)onthediscitself.Ineithercaseifyourplayercanoutputtheseover HDMIthe551RisabletoreceivetheminMulti-ChannelPCMmode.

Operatinginstructions

To activate the 551R, switch the Power button on the rear panel toOnthen presstheStandby/Onbuttononthefrontpanel.

Selectingthesource

1.Selectthedesiredsourcebypushingthecorrespondingsourcebuttonon thefrontpanelorremotecontrol.

2.Ifnecessary,presstheAudioInputTypebuttontoselecttheinputmodeof thesourceequipment,eitheranalogue,digitalorHDMI(dependingonthe connection made on the rear panel). You may have already assigned this inthe‘AudioIn/OutSetupMenu’intheOSD.

The digital, analogue or HDMI icons on the display show which is the currentlyselectedinputtype.

Note: The 551R stores the input type for each source so that it is automaticallyrecalledwhenthatsourceisselectedagain.

Selectingthedesiredlisteningmode

Selectanappropriatemodeforthesourcematerial/typeyouarelisteningto by pressing the Stereo or Surround Modes button and cycling through sub- modeswhereavailable.

Inallcasesthefirsttimeamodebuttonispressedthe551Rwillreportthe currentdecodingmodeonthefrontpaneldisplay.Pressingthebuttonagain will then cycle to the next available mode (if there is one). If no button is pressed for 4 or 5 seconds the 551R returns to normal operation without changingmode.

Stereo Modes - Selects 2 channel Stereo operation for stereo material, pressingagainselectsStereo+Submode.

This is a digitally processed mode that allows bass and treble controls, and sub generation if required. The input can be either analogue (in which case itwillbeturnedintodigitalby24bitA/Dconversion)ornativelydigital.

Surround Modes - Selects a range of digital surround modes for the appropriatelydigitallyencodedmaterial

Note: Some Surround Sound types (such as the Dolby and DTS HD) are availableonlyfromBlu-raydiscoverHDMI.

Pressing the Surround Modes button will cause the 551R to lock onto the incoming bitstream and select the first available mode for the current bitstreamtype.

In some circumstances (see tables) pressing the button again will switch to analternativedecodingoption.

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Cambridge Audio 551R DSPmodes, Stereo/Stereo+Sub, Othermodes AnalogueStereoDirect, MultiChannelPCM, Operatinginstructions
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551R specifications

The Cambridge Audio 551R is a versatile and sophisticated A/V receiver that stands out in its class, designed for audiophiles and home theater enthusiasts alike. Combining cutting-edge technology with elegant design, the 551R delivers a remarkable audio-visual experience.

At the heart of the 551R is its robust amplification system, which offers 100 watts per channel across seven channels. This provides ample power to drive a wide variety of speakers, ensuring dynamic sound across all listening levels. The receiver features a high-quality digital signal processing unit that enhances audio performance while accommodating the latest high-definition formats.

One of the standout features of the Cambridge Audio 551R is its extensive connectivity options. With multiple HDMI inputs, the 551R allows for seamless integration with various devices, such as Blu-ray players, gaming consoles, and streaming devices. The HDMI inputs support 3D video and 4K pass-through, ensuring compatibility with modern home entertainment systems. Additionally, it includes multiple digital and analog inputs, allowing users to connect traditional audio sources.

The 551R employs a sophisticated user interface, complete with an intuitive on-screen display. This makes navigating through settings and configurations effortless, even for those who may not be tech-savvy. The receiver also comes with a remote control that offers convenient access to essential functions.

Cambridge Audio places high importance on sound quality, and the 551R is no exception. Its premium components, including a high-grade DAC (Digital to Analog Converter) and carefully selected capacitors, contribute to achieving an exceptionally clean and natural sound signature. The receiver also offers various sound modes and equalization settings, which allow users to tailor the audio output to their room’s acoustics and personal preferences.

Another key characteristic is the inclusion of advanced video processing technologies. The 551R can upscale standard video sources to near-HD quality, enhancing the overall viewing experience. This is especially beneficial for older content or lower-resolution media, allowing users to make the most of their display’s capabilities.

In summary, the Cambridge Audio 551R A/V receiver is a powerful and versatile product that brings together exceptional sound quality, extensive connectivity options, and user-friendly functionality. Whether for music appreciation or cinematic experiences, the 551R is designed to satisfy the most discerning audio and video aficionados, making it an excellent choice for any home entertainment setup.
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