Levelcalibration
The 551R allows level calibration to match the acoustic level between different types/sizes or even manufacturers of speaker that may be being usedforeachchannel.Thisisachievedbyadjustingtherelativelevelofeach speaker.Thiscanbedonemanuallythroughthe‘LevelCalibration’menuin theOSDorautomatically,seethefollowingAutosetupsectionofthismanual. The basic process for manual adjustment is to listen to or measure with a SoundPressureLevel(SPL)meter(moreaccurateandrecommendedbutnot essential)thelevelofsoundproducedbyeachspeakerandsetrelativelevels for each speaker so that they all sound the same loudness at the normal listening position. The 551R incorporates a Test Signal Generator (broad- bandwhitenoise)tofacilitatethis.
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 pressingtheLeftorRightarrows:
Level Calibration Menu
Test Signal | : |
| On |
Front L | : | 0 | dB |
Front R | : | 0 | dB |
Surround L | : | 0 | dB |
Surround R | : | 0 | dB |
Centre | : | 0 | dB |
Subwoofer | : | 0 | dB |
Surr. LB | : | 0 | dB |
Surr. RB | : | 0 | dB |
| Return : [OSD] |
|
|
YoucannowmoveupanddownthechannelsusingVolumeUp/Downonthe remote.Eachtimeanewchannelisselectedthetestsignalwillbeheardto movetothatchannel.Comparetheloudnessofallchannelsasheardatthe listeningposition.
A“rushing”or“hissy”soundshouldbeheard.
Now adjust the channels so they all sound the same (in terms of loudness only,channelsofdifferentfrequencyresponsescansounddifferentinterms ofthe“tone”ofthesoundi.e.moreorlesshissy).
Pickthechannelthatsoundsmostdifferentandselectittolistentothetest 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. Thelevelcan be adjusted up to + or - 10dB in 1dB steps.Repeat the process with the next most different channel. Once all channels sound the same in terms of loudness, press the OSD button again to save the settingsandexitthemenu.
AutospeakersetupforDistance/Level
The 551R includes our simple automatic speaker setup system called 'CAMCAS'(CambridgeAudioMicControlledAutoSetup).Thesystemperforms twosetsoftestsfirstlycheckingwhichspeakersareconnectedandwhether they are wired correctly and in phase then second automatically measuring andadjustingthespeakerdelaytimings(i.e.distancesetting)andlevels. Before activating this feature the 'Decode Mode' (i.e. type of speaker package e.g. 5.1, 7.1) of the 551R and Large/Small/None status of each speakermustbesetcorrectlyaspersection1.Thisisimportantastheunit willonlylookforandcheckthespeakersyouhavetoldityouhave.
ToperformAutoDistance/Levelsetupfirstconnectthesuppliedmicrophone tothefrontLeftfrontpanelaudioinputonthefrontpanelandplaceitatyour normallisteningpositionintheroom.
Press the OSD button on the remote control to access the OSD and then selecttheSpeakerSetupMenu.Nowselecttheoption'AutoSetup'.Thiswill accessthe'AutoSetupMenu'asbelow.
Speaker Setup Menu
Auto Setup
Speaker Configuration
Speaker Distance
Level Calibration
Speaker Crossover
Return : [OSD]
Follow the
Auto Setup Menu
Plug the microphone into the left channel of Video 3 on the front panel and place the microphone at normal listening position and height
Continue : [ENTER]
Once activated the OSD will display the message below and the word 'AUTOSETUP' willalsobedisplayedonthefrontpanelofthe551Rtoconfirm.
Auto Setup Menu
The unit is now checking which speakers are connected and their phase
Please wait........
Aseriesoftestsignalswillnowbeoutputfromalloftheconnectedspeaker terminalsofthe551R(includingtheSubwooferoutput).
Oncefinishedtheunitwilldisplayascreensimilartotheonebelowreporting whichspeakerswerefoundandanythatappearoutofphase.
Auto Setup Menu
The speakers that have been found are:
L C R SL SR LB RB SW
All speakers are in phase
Continue : [ENTER]
If any speakers appear unconnected or out of phase carefully check the
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