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Meridian Audio G68 manual Using the Sine/Sub/Sens controls, Subwoofer crossover frequency

Models: G68 G68

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Using the Sine/Sub/Sens controls

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C a l i b r a t i n g t h e s y s t e m

Using the Sine/Sub/Sens controls

This section explains how to use the Sine/Sub/Sens controls to check for room resonances, adjust the subwoofer crossover frequency, or adjust the sensitivity of the analogue sources.

To display the Sine/Sub/Sens controls

•If necessary, unlock the digital surround controller as described in Configuration Wizard, page 25.

•Press Xovr- or Xovr+ to decrease or increase the crossover frequency.

The display shows the current crossover frequency:

CD Xover 85Hz

Sine -Xover+ -Sens.+

• Press More until the bottom line of the display shows:

Radio Trifield

65

Sine/Sub/Sens. Store Clear

•Press Sine/Sub/Sens.

The bottom line of the display shows the Sine/Sub/Sens controls:

Radio Trifield

65

Sine -Xover+ -Sens.+

Subwoofer crossover frequency

The G68 Digital Surround Controller allows the crossover frequency for any subwoofers which you have to be adjusted between 30 and 150Hz. The crossover can be set independently for Music, Logic, and 5.1 Movie layouts. The default is the THX standard of 80Hz.

To adjust the subwoofer crossover frequency

•Select a source, then display the Sine/Sub/Sens controls as described above.

For THX loudspeaker systems you should not adjust these settings; they should be left at 80Hz. 80Hz is also the recommended setting for all movie listening. You may prefer, however, to lower the crossover frequency for music if the main speakers have good bass handling down to, say, 50Hz.

Sinewave sweep test

The G68 includes a sinewave signal test, to help you set the subwoofer crossover frequencies, or check for room resonances.

Warning: This test is very loud. Very loud low-frequency signals may damage the speakers.

To use the sinewave sweep test

•Select a source, then display the Sine/Sub/Sens controls as described above.

•Press Sine to turn on the sinewave signal.

The display shows:

CD Sine 80.0Hz

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Meridian America G68 Using the Sine/Sub/Sens controls, Subwoofer crossover frequency, Sinewave sweep test, CD Xover 85Hz

Contents

Installation Guide G68 Digital Surround ControllerSafety warnings To avoid overheatingTo avoid interference Radio interferenceContents Copyright and acknowledgements Sales and service in the UKSales and service in the USA i P r e f a c eIntroduction Digital surround controller modelsG68 Digital Surround Controller Video switchingSmart Source feature 2 I n t r o d u c t i o n3 I n t r o d u c t i o n Meridian Room CorrectionMulti-zonecapabilities Integral tunerSpecifications PowerDimensions WeightInstalling the digital surround controller UnpackingAudio inputs Use this connector6 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e r7 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rTV tuner G68 Digital Surround Controller8 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rSACD/DVD-Aplayer 9 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Audio outputs Digital version G68D1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rDigital and analogue version G68ADV 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Use this outputAnalogue version G68AXV 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Use this outputBalanced analogue version G68XXV 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Use this outputDSP5000C 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r 1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rG68ADV/AXV Digital Surround Controller G68ADV/AXV/XXV1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rSubwoofer G68 Digital Surround Controller SUB DIRECT CROSSOVER INPUTINPUT PHONO LEADVideo connections 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Main composite outputs1 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rVideo outputs Use this outputG68ADV/AXV/XXV 1 I n s t a l l i n g t h ed i g i t a l s u r r o u n d c o n t r o l l e r Television/monitor2 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e r2 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rG68ADV/AXV/XXV Video recorderTuner and communications connections Use this connection2 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rAuto Not Con2 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e r2 I n s t a l l i n g t h e d i g i t a l s u r r o u n d c o n t r o l l e rG68 Digital Surround Controller To connect FM and AM antennaeConfiguring the digital surround controller Configuration WizardTo run the Configuration Wizard To go back to an earlier configuration optionStage 1 Resetting the product 1 Reset settingsReset all settings? To reset the configurationTypes TypeSpeakers Music SubStage 2 Configuring speakers To configure the speakers2 Select speakers EitherSpeaker options OptionValues DescriptionStage 3 Configuring sources 3 Configure sourcesTo configure a source RadioSource options OptionValues DescriptionStage 4 Configuring other settings 4 Other settingsTo configure other settings To change a settingSettings OptionValues DescriptionPage Introduction Using a Sound Pressure Level meterCalibrating the system To start the calibration procedure To exit from the calibration procedureTo complete the calibration procedure Left Level +0.0dBCalibration tests LevelsDistance Left Level +0.0dBFine tuning PhaseSetting Left DistanceC a l i b r a t i n g t h e s y s t e m Speaker sizeLeft Size 5/28 Using the Sine/Sub/Sens controls Subwoofer crossover frequencySinewave sweep test To adjust the subwoofer crossover frequency88.5Hz 81.5HzPause 80.0HzSetting up sources To adjust the sensitivity of a sourceTV 1.4V Peak TV 2.0V ClipDSP presets DSP presets4 D S P p r e s e t s Speaker layoutsStandard parameters Default4 D S P p r e s e t s ParameterDSP presets for two-channelmaterial Music and Trifield DSP preset parameters4 D S P p r e s e t s MusicAmbisonics and Super DSP preset parameters 4 D S P p r e s e t sAmbisonics SuperMusicLogic DSP preset parameters PLIIx Music DSP preset parameters4 D S P p r e s e t s MusicLogicPLIIx Movie and PLIIx THX DSP preset parameters 4 D S P p r e s e t sStereo and Direct PLIIx Movie and PLIIx THXTV Logic DSP preset parameters Mono DSP preset parameters4 D S P p r e s e t s TV LogicDSP presets for multichannel material Discrete and Cinema DSP preset parameters5 D S P p r e s e t s CinemaTHX DSP preset parameters 5 D S P p r e s e t sParameter OptionsAmbisonics Using dynamic range control5 D S P p r e s e t s 5 D S P p r e s e t s Defining your own presetsTo save the preset settings 5 D S P p r e s e t s To clear a user-definedpresetStored Troubleshooting General operating problems5 Tr o u b l e s h o o t i n g Standby light not litAudio problems 5 Tr o u b l e s h o o t i n gRemote not working Unit is overheatingAudible hiss at high volume settings Configuration Program Guide5 Tr o u b l e s h o o t i n g Sound not clearVideo problems Radio tuner problems5 Tr o u b l e s h o o t i n g sourceMaintenance CleaningTo clean the case, display panel, and keypad To clean the audio and video connectionsService and guarantee ServiceGuarantee 6 Tr o u b l e s h o o t i n gIndex I n d e6 I n d e 6 I n d e 6 I n d e video switching 6 I n d evideo connections 17 inputs 18 outputs Width DSP parameter6 I n d e