Cambridge Audio 650R user manual Level calibration, Auto speaker setup for Distance/Level

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Level calibration

The 650R allows level calibration to match the acoustic level between different types/sizes or even manufacturers of speaker that may be being used for each channel. This is achieved by adjusting the relative level of each speaker. This can be done manually through the ‘Level Calibration’ menu in the OSD or automatically, see the following Auto setup section of this manual.

The basic process for manual adjustment is to listen to or measure with an SPL meter (more accurate and recommended but not essential) the level of sound produced by each speaker and set relative levels for each speaker so that they all sound the same loudness at the normal listening position. The 650R incorporates a Test Signal Generator (broad-band white noise) to facilitate this.

Set the unit to a normal listening level or half maximum volume approximately. Press the OSD button on the remote control then select the ‘Level Calibration’ menu. Now turn on the test signal by highlighting this item and pressing the Left or Right arrows:

Level Calibration

Test Signal

: Off

Front L

: 0dB

Front R

: 0dB

Surround L

: 0dB

Surround R

: 0dB

Centre

: 0dB

Subwoofer

: 0dB

Surr. Back L

: 0dB

Surr. Back R

: 0dB

Return

: [OSD]

A “rushing” or “hissy” sound should be heard, initially through the Front Left Speaker.

You can now move up and down the channels using Volume Up/Down on the remote. Each time a new channel is selected the test signal will be heard to move to that channel. Compare the loudness of all channels as heard at the listening position.

Now adjust the channels so they all sound the same (in terms of loudness only, channels of different frequency responses can sound different in terms of the “tone” of the sound i.e. more or less hissy).

Pick the channel that sounds most different and select it to listen to the test signal. Now adjust the relative level in dB (using Arrow left/right on the remote) and continue comparing it to other channels until it is of equal loudness. The level can be adjusted up to + or - 10dB in 1dB steps. Repeat the process with the next loudest channel etc. Once all channels sound the same in terms of loudness, press the OSD button again to save the settings and exit the menu.

Auto speaker setup for Distance/Level

The 650R includes our simple automatic speaker setup system called 'CAMCAS' (Cambridge Audio Mic Controlled Auto Setup). The system performs two sets of tests firstly checking which speakers are connected and whether they are wired correctly and in phase then automatically measuring and adjusting the speaker delay timings (i.e. distance setting ) and levels.

Before activating this feature the 'Decode Mode' (i.e. type of speaker package e.g. 5.1, 6.1, 7.1) of the 650R and Large/Small/None status of each speaker must be set correctly as per section 1. This is important as the unit will only look for and check the speakers you have told it you have.

To perform Auto Distance/Level setup first connect the supplied microphone to the front Left front panel audio input on the front panel and place it at your normal listening position in the room.

 

 

 

 

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Stereo Direct

L

 

 

R

 

 

 

 

 

 

 

Display

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Video 3

Audio

 

Video

 

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Auto Setup

Press the OSD button on the remote control to access the OSD and then select the Speaker Setup Menu. Now select the option 'Auto Setup'. This will access the 'Auto Setup Menu' as below.

Auto Setup Menu

Plug the microphone into the left channel of Video3 on the front panel and place the microphone at normal listening position and height

Continue: [ENTER]

Cancel/Return : [OSD]

Follow the on-screen instructions and press 'Enter' on the remote control when ready to start the Auto Setup function.

Once activated the OSD will display the message below and the word 'AUTOSETUP' will also be displayed on the front panel of the 650R to confirm.

Auto Setup Menu

The unit is now checking which speakers are connected and their phase

Please wait........

A series of test signals will now be output from all of the connected speaker terminals of the 650R (including the Subwoofer output).

Once finished the unit will display a screen similar to the one below reporting which speakers were found and any that appear out of phase.

Auto Setup Menu

The speakers that have been found are:

L C R LS RS LB RB SW All speakers are in phase

Continue: [ENTER]

Retest/Return : [OSD]

If any speakers appear unconnected or out of phase carefully check the connections on the speaker and the back of the unit. Also check any bi-wiring links that might be present on the speaker. For any out of phase speakers check that the relevant + terminal of the 650R goes to the + terminal of that speaker and similarly the – terminal of the 650R goes to the – terminal of the speaker for that channel.

If necessary press the OSD button to perform a retest or press Enter to start the second part of the autosetup procedure as below.

Again a series of test signals will now be output from all of the connected speaker terminals and Subwoofer. The 650R uses these to measure the levels and distances (and hence introduce the correct delays) appropriate to your speakers and room characteristics.

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Contents Azur Contents Before connecting IntroductionImportant safety instructions Limited warranty Front panel controls Rear panel connections Remote control Front panel display Loudspeaker connectionsAnalogue audio connections Digital audio connectionsHdmi input connections Analogue video input connectionsVideo output connections 6.1/7.1 DirectPreamp out Front input connectionsAerial connections FM aerial650R setup Speaker configurationSpeaker setup Speaker delayAuto speaker setup for Distance/Level Level calibrationAssigning any Hdmi or DVI sources Source setupAudio connection type Video connection type Surround sound modesDSP modes Stereo/Stereo + SubOther modes Analogue Stereo Direct Multi Channel PCMOperating instructions Selecting the desired listening modeSelecting the source Decode modes 5.1 speaker setup PCMDecode modes 6.1 speaker setup Decode modes 7.1 speaker setup DTS HD High Resolution 7.1$Advanced Dolby/DTS adjustments Dynamic range controlDTS-HD speaker re-map Operating instructionsConfiguration Using the Tuner Audio split modeRecorder 1/2 Sub crossovers and bass managementTone/Sub/LFE configuration Bi-ampingOSD setup Custom installation C.I. useReset/Back-up memory Lip syncMulti-room connections PS5Troubleshooting Audio Technical specificationsGeneral AP22442/4-A

650R specifications

The Cambridge Audio 650R is a high-performance AV receiver designed to deliver an immersive audio-visual experience suitable for both home theater enthusiasts and casual viewers alike. With a blend of style, functionality, and state-of-the-art technology, it stands out in the crowded market of home audio equipment.

One of the standout features of the 650R is its impressive amplification capabilities. With 7.1 channels of amplification, it can deliver a powerful output of 100 watts per channel, allowing users to enjoy crisp and dynamic sound reproduction. This capability ensures that both dialogue and action sequences are clear and impactful, making movies, music, and gaming experiences truly captivating.

The 650R incorporates advanced audio technologies, including the renowned Dolby TrueHD and DTS-HD Master Audio, providing users with a lossless audio experience that truly captures the nuances of the original recording. This ensures that content is played back in the way it was intended to be heard, enhancing the overall enjoyment of movies or music.

Another significant feature is the onboard HDMI connectivity, which supports 3D video and 4K pass-through, offering compatibility with the latest video formats. The receiver is equipped with multiple HDMI inputs, allowing easy integration with various devices such as Blu-ray players, gaming consoles, and streaming services, ensuring a seamless user experience.

Cambridge Audio also utilizes its proprietary Adaptive Gain Control technology within the 650R. This feature intelligently adjusts the audio output levels depending on the source material, providing users with a consistent listening experience across different types of media. Additionally, the 650R includes a high-quality DAC (Digital-to-Analog Converter), enhancing audio clarity, and ensuring that even the most minute details of the soundscape are brought to life.

The design of the 650R is not only aesthetically pleasing but also user-friendly. The intuitive interface and easy-to-navigate menus make setup and operation straightforward, serving both novices and audiophiles. Furthermore, the receiver is optimized for versatility, supporting various speaker configurations, including bi-wiring and bi-amping, which allows for greater customization based on individual preferences.

Overall, the Cambridge Audio 650R stands as a testament to quality engineering in the realm of home audio. Its combination of powerful amplification, advanced audio processing, versatile connectivity options, and elegant design makes it a prime choice for anyone looking to enhance their home entertainment system. Whether watching movies, listening to music, or gaming, the 650R ensures a rich and engaging experience that is hard to match.