Meridian G68 Installation Manual
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Meridian G68 Installation Manual

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  • Page 1 G68 Digital Surround Controller Installation Guide...

  • Page 2: Important Safety Instructions

    Important safety instructions P r e f a c e • Read the instructions. • Keep these instructions. • Follow all instructions. • Do not use this apparatus near water. • Clean only with a dry cloth. • Install only in accordance with the manufacturer’s instructions. •...

  • Page 3: Table Of Contents

    Contents Introduction Provides information about the digital surround controller models, a description of each product, and technical specifications. Digital surround controller models Specifications Installing the digital surround controller 5 Describes how to install the digital surround controller and connect it to the other equipment in the system. Unpacking Audio inputs Audio outputs...
  • Page 4 Nimbus Records Ltd. Trifield is a trademark of Trifield Productions Ltd. LaserDisc is a trademark of Pioneer Electric Corp. Part no: GSC/1 Sales and service in the USA Meridian America Inc 3800 Camp Creek Parkway Building 2400 Suite 122 Atlanta GA 30331...

  • Page 5: Introduction

    2 unbalanced G68ADV 8 unbalanced G68AXV 4 balanced, 6 unbalanced G68XXV 8 balanced All versions of the G68 Digital Surround Controller include an integral FM/AM tuner and room correction. information about operating it. Digital outputs 10 digital 10 digital None None...
  • Page 6 AM/FM tuner, and represents the centrepiece of the G Series range, with multiple variants available to suit a wide range of applications. At the heart of the G68 is a powerful DSP engine consisting of five Motorola 56367s running at 150MHz – delivering an incredible 750MIPS (million instructions per second) capability.
  • Page 7 I n t r o d u c t i o n Meridian Room Correction The G68 includes Meridian Room Correction, accessed via the Meridian Configuration program. This unique feature automatically measures room resonances using a simple microphone, employing powerful DSP technology to build up to 60 high-quality digital filters that limit the reverberation time at resonant frequencies to a value similar to the overall reverberation time of the room.

  • Page 8: Specifications

    Specifications I n t r o d u c t i o n Digital inputs Analogue inputs Digital outputs Unbalanced outputs Balanced outputs Zone/Tape Video Trigger output Comms Conversion Formats DSP modes Power Processing Dimensions Weight Controls Display Indicators *A/B: Subs if two or three subs are used. Optional ceiling speakers with future software update. †LZ/RZ: May be chosen to be any pair from: Main L/R, Centre/Sub, Sides, Rears, Subs.

  • Page 9: Installing The Digital Surround Controller

    You should not make any connections to the product or to any other component in the system while the AC power supply is connected and switched on. Unpacking The G68 Digital Surround Controller is supplied with the following accessories: • MSR+ remote control with batteries, manual, and spare key caps.

  • Page 10: Audio Inputs

    OPT IN OPT IN TRIG 2 SURR L SURR L CENTRE CENTRE LEFT LEFT A A UX G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 SURR R SURR R RIGHT RIGHT Pb/B Pr/R...
  • Page 11 G07 24-bit CD Player DIGITAL OUT COMMS You can connect up to 12 digital coax sources to the G68 Digital Surround Controller. • Connect the digital source to one of the digital input sockets of the digital surround controller, using a 75 screened coax phono lead.
  • Page 12 G98DH DVD Player. • Connect the MAIN DIGITAL OUT on the G98DH to the MULTI DIG IN 1 on the G68, using three 75 screened coax phono leads. • Connect together the COMMS sockets using the Comms lead provided.
  • Page 13 • Connect the S-video output from the SACD/DVD-A player to video input S4 (AUX) on the G68, and configure the DISC source to use this video input; see Configuring sources , page 30. • Optionally connect a digital output from the source to digital input D8 (DISC) on the digital surround controller, using a digital phono lead.

  • Page 14: Audio Outputs

    Audio outputs c o n t r o l l e r The G68 hardware architecture is designed to process up to 12 completely independent output channels. Currently the software limits the number of outputs to a total of eight: Main L/R, Centre, Sub, Rears, and either Sides or two more additional subwoofers.
  • Page 15 REPLACE WITH SAME TYPE FUSE T1.6AL 250V for 100 - 240V POWER INPUT REARS ~50-60Hz 40VA MAX REAR R CENTRE G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 Pb/B Pr/R CABLE Analogue outputs...
  • Page 16 OPT IN TRIG 2 SURR L SURR L CENTRE CENTRE LEFT LEFT A A UX G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 SURR R SURR R RIGHT RIGHT TRIG 3 Pb/B...
  • Page 17 REPLACE WITH SAME TYPE FUSE T1.6AL 250V for 100 - 240V CENTRE POWER INPUT ~50-60Hz 40VA MAX SIDE L SIDE R G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 Pb/B Pr/R CABLE...
  • Page 18 To connect the G68D or G68ADV to Meridian DSP loudspeakers • Use the Comms part of an M5 lead to connect one of the COMMS sockets on the G68 to the digital speaker you have chosen as the master (typically the centre speaker).
  • Page 19 To connect the G68ADV or G68AXV to active unbalanced loudspeakers (eg Meridian M33s) G68ADV/AXV Digital Surround Controller PHONO LEAD • Connect the appropriate analogue out sockets from the digital surround controller to the speaker inputs, using phono leads. To connect the G68ADV, G68AXV, or G68XXV to a stereo power amplifier (eg Meridian G56 or G57) G68ADV/AXV/XXV •...
  • Page 20 To connect an active subwoofer (eg Meridian M1500 or M2500) • Connect the SUB analogue output socket from the G68 Digital Surround Controller to the subwoofer’s line-level input using a phono lead.

  • Page 21: Video Connections

    REPLACE WITH SAME TYPE FUSE T1.6AL 250V for 100 - 240V POWER INPUT REARS ~50-60Hz 40VA MAX REAR R CENTRE G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 Pb/B Pr/R CABLE Component inputs...
  • Page 22 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 r Video outputs The following table gives details of the video outputs (G68ADV, AXV, and XXV only): Use this output MAIN OUT...
  • Page 23 V1 to V4 on the G68. • Connect the composite MAIN OUT and S-video MAIN OUT from the G68 to the corresponding inputs on your television or monitor. Unless you have used the default assignment of inputs to sources, as shown on the back panel, configure the sources appropriately as described in Configuring sources , page 30.
  • Page 24 To connect to a G98DH DVD Audio Transport with video switching in the G68 and scaling in the G98 If you are using the G68ADV, AXV, or XXV Digital Surround...
  • Page 25 COMMS LEAD PHONO LEAD S-VIDEO LEAD The G68 can copy the currently selected audio and video inputs to two different outputs, called COPY ZONE 2 and ZONE 3, for recording, or for controlling one or two other rooms. For example, a G51 Receiver could be used in a second room to listen to a source connected to the G68.

  • Page 26: Tuner And Communications Connections

    OPT IN TRIG 2 SURR L SURR L CENTRE CENTRE LEFT LEFT A A UX G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 SURR R SURR R RIGHT RIGHT TRIG 3 Pb/B...
  • Page 27 To connect to other Meridian G Series, 500 Series, or 800 Series equipment G68 Digital Surround Controller COMMS COMMS LEAD In a system of Meridian products, one of the products acts as the controller for the system, receiving infra-red commands from the MSR+, and then, if appropriate, relaying them to the other products via the Comms link.
  • Page 28 The tuner can be used with most proprietary indoor AM, FM, or combi (AM/FM) antennae. It is possible in some cases to use a trigger output (+12V) from the G68 to power such devices. For more details, look at the Library/Applications sections of the...

  • Page 29: Configuring The Digital Surround Controller

    Configuring the digital surround controller This chapter explains how to configure the digital surround controller using the Configuration Wizard. Alternatively, for complete control over all aspects of the product’s configuration you can set up the unit from a computer using the Meridian Configuration Program. For full information refer to the Meridian Configuration Program Guide available separately.

  • Page 30: Stage 1: Resetting The Product

    C o n f i g u r i n g t h e d i g i t a l s u r r o u n d Stage 1: Resetting the product c o n t r o l l e r The digital surround controller provides several alternative standard settings, called Types, which configure all aspects of the product into the most commonly needed configurations.
  • Page 31 Types The following table lists the available Types: Type Speakers All analogue. All analogue. All digital. All digital, large centre. Digital left, right, and centre. Digital left and right. Music Sub refers to a subwoofer used for all Music DSP presets, Logic Sub to a subwoofer used for all Logic DSP presets, and 5.1 Movie Sub to a subwoofer used for all 5.1 Movie DSP presets;...

  • Page 32: Stage 2: Configuring Speakers

    C o n f i g u r i n g t h e d i g i t a l s u r r o u n d Stage 2: Configuring speakers c o n t r o l l e r The Speakers configuration stage allows you to set up the digital surround controller for the particular arrangement of loudspeakers in your system.
  • Page 33 Speaker options The following table summarises the speaker options: Option Values Number of Subwoofers: none, one, two, three The main L&R speakers are: small analogue/THX, small DSP, large analogue, large DSP The Centre is used: always, never, for music, for movies The Centre speaker is a: small analogue/THX, small DSP, large analogue, large DSP...

  • Page 34: Stage 3: Configuring Sources

    C o n f i g u r i n g t h e d i g i t a l s u r r o u n d Stage 3: Configuring sources c o n t r o l l e r The digital surround controller provides up to 12 sources corresponding to the 12 source keys on the MSR+: CD, RADIO, DVD, AUX, DISC, TAPE, TV, CABLE, SAT, VCR1, VCR2,...
  • Page 35 Source options The following table summarises the source options: Option Values The source is: in use, not in use Audio input: D1-D12, MD1-MD2, O1-O5, Tuner, A1-A8, MA1, Last Valid* Composite input: † V1-V4, Last Valid* S input: † S1-S4, Last Valid* Component Input: †...

  • Page 36: Stage 4: Configuring Other Settings

    C o n f i g u r i n g t h e d i g i t a l s u r r o u n d Stage 4: Configuring other settings c o n t r o l l e r The next stage allows you to configure other aspects of the product’s operation.
  • Page 37 Zone 3 analogue out: fixed, variable Timeout to Home buttons: on, off Diagnostic displays: on, off Is the G68 IR Controller? Auto, Controller, Not Controller Main System Address Copy System Address Zone System Address Product Address Description Band selection (MW/LW or AM), tuning steps, and FM deemphasis standard.
  • Page 38 C o n f i g u r 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 r...

  • Page 39: Calibrating The System

    To help you to set up the installation to give the best possible sound with any particular combination of associated equipment, the G68 Digital Surround Controller includes a built-in This calibration procedure uses test signals to present a series of sounds, which you use to adjust certain aspects of the system to their optimum settings.
  • Page 40 C a l i b r a t i n g t h e s y s t e m To start the calibration procedure Either: • Press Next on the last option of configuring settings; see page • Press On/Off to put the digital surround controller into standby. •...

  • Page 41: Calibration Tests

    Calibration tests Levels These tests allow you to adjust the output level to each speaker individually, and it follows the general guidelines from Dolby Laboratories and THX. In each test the display shows the speaker being tested, and the current relative level. For example: Press More for help Left Level...

  • Page 42: Fine Tuning

    C a l i b r a t i n g t h e s y s t e m • Use to move between each of the speakers in the layout. The display shows the speaker being tested, and the distance: Press More for help Left Units ìî...

  • Page 43: Speaker Size

    Speaker size These tests allow you to determine the bass handling capability of large analogue speakers and subwoofers. Once set, the digital surround controller will limit the bass level to protect the speakers from potential damage. In each test the display shows the speaker being tested and the level of the test signal, followed by the limit value set for the speaker.

  • Page 44: Using The Sine/Sub/Sens Controls

    50Hz. Sinewave sweep test The G68 includes a sinewave signal test, to help you set the subwoofer crossover frequencies, or check for room resonances. -Xover+ -Sens.+...
  • Page 45 An 80Hz sinewave will be played through all channels. You can change the test signal using the menu keys, as described in the following sections. To select the channel • Press Chan. You can select any individual channel, or All Channels. To change the sweep rate •...

  • Page 46: Setting Up Sources

    C a l i b r a t i n g t h e s y s t e m Setting up sources This section explains how to use the Sine/Sub/Sens controls to adjust the sensitivity of the analogue sources. To adjust the sensitivity of a source To obtain the best signal-to-noise ratio for each analogue source you can adjust its sensitivity to give the highest level that does not...

  • Page 47: Dsp Presets

    This chapter gives details of the DSP presets and their parameters, and describes how to DSP presets The G68 Digital Surround Controller provides two types of DSP preset. One set is available if the input is two-channel; eg from a traditional stereo source or a two-channel DVD-A.
  • Page 48 D S P p r e s e t s Standard parameters All DSP presets (except Mono and Direct) provide the following standard parameters. Individual DSP presets provide additional parameters, to allow you to adjust specific features provided by that preset. For full details refer to information about each preset later in this chapter.
  • Page 49 DSP presets for two-channel material The G68 provides several signal processing options for two-channel material. The Music DSP presets are designed for use with music from sources such as CD, radio, or two channel DVD-A: • Music, Trifield, Ambisonics, Super Stereo, Music Logic, PLIIx Music, Stereo, and Direct.
  • Page 50 D S P p r e s e t s Ambisonics The Ambisonics DSP preset can decode UHJ format, the two- channel stereo-compatible encoding found on Ambisonically- recorded discs and broadcasts. This material is specifically encoded for surround reproduction and can give breathtakingly realistic sound when replayed using the digital surround controller.
  • Page 51 MusicLogic MusicLogic is a music DSP preset based on Pro Logic II with the addition of user-adjustable steering, designed to provide an exciting experience with many types of studio-produced music. MusicLogic DSP preset parameters Parameter Options Roll Off, Low, Med, Max Off, Low, Med, Max Steered All Steered Rear, Steered Side, Steered All...
  • Page 52 D S P p r e s e t s Stereo and Direct The Stereo preset passes the left and right input signals directly to the left and right main speakers. Any mono or front left and right subwoofers continue to be used. With the Direct preset only the left and right main speakers are used, bypassing any spatial processing and bass management.
  • Page 53 TV Logic TV Logic is a Logic preset based on Pro Logic IIx with the addition of user-adjustable steering, designed to give higher intelligibility and a more appropriate spatial presentation for studio-based TV material. TV Logic DSP preset parameters Parameter Options Roll Off, Low, Med, Max...
  • Page 54 (such as Dolby Digital) or as discrete channels from a DVD player. If you are using Meridian SmartLink then all formats will reach the G68 as discrete channels. With suitable loudspeakers the G68 can upsample these to provide a more enjoyable surround experience.
  • Page 55 As with the PLIIx THX DSP preset, THX re-equalises the signals to suit domestic listening conditions, and applies frequency-response correction and decorrelation to the surround channels to make the surround sound more realistic. It can be used whether or not your other equipment is THX approved.
  • Page 56 D S P p r e s e t s Ambisonics The Ambisonics preset allows you to decode multi-channel sources which have been encoded in Ambisonics B format. Ambisonics B format contains four independent channels of information to give a three-axis representation of the sound at the recording position.

  • Page 57: Defining Your Own Presets

    Defining your own presets The G68 Digital Surround Controller allows you to modify any of the built-in presets, and save them for future use. You can either save the changes to the built-in preset, or you can create up to 10 presets of your own, with names of your choice, so you can use them alongside the built-in presets.
  • Page 58 D S P p r e s e t s For example, you could change the name to: Write label for preset ìî • When you have entered the name you want to use press Store. The display shows: Stored ìî...

  • Page 59: Troubleshooting

    • Check that the ON OFF switch on the back panel is in the ON position. If the light still does not illuminate, check any fuses in your power supply and the fuse in the inlet of the G68. If these are all intact, contact your dealer. assistance.
  • Page 60 Auto Configure procedure; see To connect to other Meridian G Series, 500 Series, or 800 Series equipment , page 23. • See if the G68 has been set up as Not Controller in the Configuration Menu; see Configuring other settings , page 32.
  • Page 61 There is a hiss when starting DTS LaserDiscs or CDs The DTS audio stream is indistinguishable from a PCM audio stream; the G68 takes 30ms to identify the encoding, during which a hiss is heard. • With non-video DTS sources you can add a 30ms delay to avoid this.
  • Page 62 • Are you using suitable quality cables with good connectors? • Is there a ground loop created between any of the components connected to the G68? Remember that reception of broadcast or cable signals can be significantly deteriorated by cross-modulation in the RF domain. It is unwise to attempt to cascade and mix several video sources, eg LaserDisc, VCR, etc, to an antenna system.

  • Page 63: Maintenance

    Maintenance Cleaning To clean the case, display panel, and keypad • Disconnect the power cord before cleaning the unit. The exterior surfaces of Meridian G Series products are made from solid anodised aluminium, powder coated steel, thermoplastic rubber, and glass. They are designed to be easily wiped clean with a dry, lint free cloth.

  • Page 64: Service And Guarantee

    Service and guarantee Tr o u b l e s h o o t i n g Service The Meridian G Series of hi-fi components has been carefully designed to give years of untroubled service. There are no user- serviceable parts inside the case, nor do the units require any form of maintenance.

  • Page 65: Index

    Academy (DSP parameter) 49 accessories 5 active loudspeakers, connecting to 15 active subwoofer, connecting to 16 Ambisonics (DSP preset) 46, 52 analogue source, connecting 7 antennae, connecting 24 audio/video recorder, connecting to 21 audio inputs 6 audio outputs 10 automatic setup 23 Axis (DSP parameter) 44 Balance (DSP parameter) 44 Bass (DSP parameter) 44...
  • Page 66 I n d e x DSP parameters (continued) Depth 44 LipSync 44 Phase 44 RC 44 Rear 44 R Delay 44 Sides 44 S Delay 44 Treble 44 DSP presets Ambisonics 46, 52 Cinema 50 clearing 54 Compress parameter 52 Direct 48 Discrete 50 EX 51...
  • Page 67 G68D 1 audio inputs 6 audio outputs 10 comms connections 22 specifications 4 tuner connections 22 G68XXV 1 audio inputs 6 audio outputs 13 comms connections 22 specifications 4 tuner connections 22 video connections 17 G98DH DVD Audio Transport, connecting to 20 guarantee 60 HS Out? (DSP parameter) 44 Input (DSP parameter) 49...
  • Page 68 I n d e x RC (DSP parameter) 44 Rear (DSP parameter) 44 Roll (DSP parameter) 47, 49 Row (DSP parameter) 46 R Delay (DSP parameter) 44, 47 R Filter (DSP parameter) 45, 46, 50 safety warnings ii second zone, connecting 21 settings 33 configuring 32 Sides (DSP parameter) 44...
  • Page 69 video connections 17 inputs 18 outputs 18 video switching 19, 20 Width (DSP parameter) 45, 46, 47 Yaw (DSP parameter) 47, 49 I n d e x...
  • Page 70 I n d e x...

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