Meridian G68 Installation Manual
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Meridian G68 Installation Manual

Digital surround controller
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G68 Digital Surround Controller
Installation Guide

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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 To avoid overheating • Read the instructions. • Keep these instructions. • Leave at least 10cm around the equipment to ensure sufficient • Follow all instructions. ventilation. • Do not use this apparatus near water. •...

  • Page 3: Table Of Contents

    i i i Contents C o n t e n t s Introduction DSP presets Provides information about the digital surround controller Gives details of the DSP presets and their parameters, and models, a description of each product, and technical describes how to modify them.
  • Page 4 Designed and manufactured in the UK by Meridian Audio (US patents 5,043,970;5,189,703;5,222,059. European patent Ltd. Meridian Audio reserves the right to make changes and 0323830), Trifield Productions Ltd, and Nimbus Records Ltd. improvements to any of the products described in this document without prior notice.

  • Page 5: Introduction

    8 unbalanced, 4 balanced 10 digital Component only G68XXD 8 balanced 10 digital Component only G68ADV 8 unbalanced 10 digital G68AXV 6 unbalanced, 4 balanced None G68XXV 8 balanced None All versions of the G68 Digital Surround Controller include room correction.
  • Page 6 Meridian design philosophy, as well as superior performance. At the heart of the G68 is a powerful DSP engine consisting of five As a result, the G68 can decode surround signals from all PCM Motorola 56367s running at 150MHz –...
  • Page 7 I n t r o d u c t i o n Meridian Room Correction The G68 incorporates Meridian Room Correction, a unique system that compensates for acoustic deficiencies in your listening room, particularly at the bass end. It achieves this by automatically...

  • Page 8: Specifications

    Specifications I n t r o d u c t i o n Inputs/outputs G68AXD G68XXD G68ADV G68AXV G68XXV Digital inputs 6 coax digital inputs, 4 optical digital inputs, 2 6-channel coax inputs, all MHR. USB input 1 USB digital input allows connection to a Windows PC or Macintosh. Analogue inputs 5 stereo unbalanced inputs;...

  • Page 9: Installing The Digital Surround Controller

    Unpacking If any of these items are missing please contact your dealer. Note: You should retain the packaging in case you need to The G68 Digital Surround Controller is supplied with the following transport the unit. accessories: • MSR+ remote control with batteries, manual, and spare key caps.

  • Page 10: Audio Inputs

    COMPOSITE IN OPT IN TRIG 2 USB AUDIO IN OPT IN ANTENNA SURR L CENTRE LEFT G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 VCR1 CABLE TAPE SURR R RIGHT TRIG 3...
  • Page 11 DIGITAL OUT COMMS COMMS LEAD DIGITAL LEAD You can connect up to 12 digital coax sources to the G68 Digital If the source is a Meridian product connect together the COMMS Surround Controller. sockets using the Comms lead provided. • Connect the digital source to one of the digital input sockets of the digital surround controller, using a 75Ω...
  • Page 12 You can connect a Windows PC or Macintosh to the G68 via the The first time that the G68 is plugged in to the PC or Macintosh USB input to allow you to use the G68 as a digital audio output it will automatically be recognised, and appropriate drivers will be device.
  • 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 32. • 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 software updates will allow these outputs to be used in addition to completely independent output channels. Currently the software side speakers for either extra subwoofers or height channels.
  • Page 15 USB AUDIO IN OPT IN ANTENNA REAR L REAR R SIDE L SIDE R SURR L CENTRE LEFT G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 VCR1 CABLE TAPE SURR R RIGHT GAME...
  • Page 16 MAIN OUT COMPOSITE IN OPT IN TRIG 2 USB AUDIO IN OPT IN ANTENNA SURR L CENTRE LEFT G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 VCR1 CABLE TAPE SURR R RIGHT Pb/B...
  • Page 17 MAIN OUT COMPOSITE IN OPT IN TRIG 2 USB AUDIO IN OPT IN ANTENNA SURR L CENTRE LEFT G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 VCR1 CABLE TAPE SURR R RIGHT Pb/B...
  • Page 18 MAIN OUT COMPOSITE IN OPT IN TRIG 2 USB AUDIO IN OPT IN ANTENNA SURR L CENTRE LEFT G68 SURROUND CONTROLLER DESIGNED AND MADE IN ENGLAND BY MERIDIAN AUDIO LTD DESIGN AND COPYRIGHT 2003 VCR1 CABLE TAPE SURR R RIGHT Pb/B...
  • Page 19 • Use the Comms part of an M5 lead to connect one of the • Link each pair of speakers together with an S5 lead, out of COMMS sockets on the G68 to the digital speaker you have the first speaker and into the second speaker, as shown in the chosen as the master (typically the centre speaker).
  • Page 20 To connect the G68 to power amplifiers or to analogue active and passive speakers powered by a Meridian G41 Analogue subwoofer...
  • Page 21 G68. The this instead of the subwoofer’s crossover. To do this remove any...

  • Page 22: Video Connections

    Video connections c o n t r o l l e r G68AXD and G68XXD Digital Surround Controllers The Meridian G68AXD and G68XXD provide video switching of component video sources only. Component inputs CAUTION REPLACE WITH...
  • Page 23 COPY ZONE 2 and ZONE 3 outputs, for Surround Controllers recording or control of up to two additional rooms. The Meridian G68ADV, G68AXV, and G68XXV provide video switching of component, S-video, and composite video sources to the main video outputs.
  • Page 24 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: Use this output To connect to this...
  • Page 25 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 32.
  • Page 26 To connect to a G98DH DVD Audio Transport with video switching in the G68 and scaling in the G98 Game...
  • Page 27 MONITOR IN ZONE 3 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 28: Tuner And Communications Connections

    Trigger outputs 2 & 3 Use this connection To connect to this DIN COMMS Other Meridian G Series, 500 Series, or 800 Series equipment, or Meridian DSP loudspeakers. BNC COMMS Future Meridian components. RS232 connection A computer, for configuring the digital surround controller.
  • Page 29 To connect to other Meridian G Series, 500 Series, or 800 Series equipment G68 Digital Surround Controller...
  • Page 30 (AM/FM) antennae. It is possible in some cases to use • Connect an AM antenna to the AM connector by pressing a trigger output (+12V) from the G68 to power such devices. the tabs and inserting a bare wire into each hole. The ground...

  • Page 31: 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 32: 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 •...
  • Page 33 LFE subwoofer is only active in multichannel presets. Mono and Centre Subwoofers are active in all presets. Note that any Types stored using the Meridian Configuration Program will also be available in this list; see the Meridian Configuration Program Guide for more information .

  • Page 34: 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 A description of each option is shown on the top line of the surround controller for the particular arrangement of loudspeakers...
  • Page 35 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 Speaker options The following table summarises the speaker options: Option Values...

  • Page 36: 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 The display shows the first source and the first configuration option corresponding to the 12 source keys on the MSR+:...
  • Page 37 High, Low, Last Valid Trigger outputs for the source. Comms Type: CD 1C, Tuner 2C, DVD 3C, 4C-8C, Set to NC unless the source is a Meridian product. No Comms NC Comms Address: 1A-8A Allows you to have up to eight of each source type.
  • 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 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 To change a setting •...
  • Page 39 Whether the soft keys revert to the home keys after a delay. Diagnostic displays: on, off Whether diagnostic displays are shown. Is the G68 IR Controller? Auto, Controller, Not Controller Whether the product is the infra-red controller for the system. Main System Address Advanced setting (normally 1).
  • Page 40 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 To toggle the IR mode •...

  • Page 41: Calibrating The System

    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 calibration procedure. 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 42 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 For more detailed information about this and the other calibration Either: tests see the following sections. •...

  • Page 43: Calibration Tests

    75dB SPL using an SPL meter. Even if the speakers are not THX Left Right approved this setting is recommended. Side Side If you have Meridian DSP loudspeakers they cannot be set above +0dB. Left Rear Surround Sub Right Rear Note: You cannot set the level of a subwoofer by ear, because low-frequency noises sound quieter.
  • Page 44 C a l i b r a t i n g t h e s y s t e m • Use > and < to move between each of the speakers in the The next display shows the distance for the same speaker. For layout.

  • Page 45: Speaker Size

    C a l i b r a t i n g Speaker size t h e s y s t e m These tests allow you to determine the bass handling capability of subwoofers and large analogue speakers. Once set, the digital surround controller will limit the bass level to protect the speakers from potential damage.

  • Page 46: Using The Sine/Sub/Sens Controls

    Sinewave sweep test The bottom line of the display shows the Sine/Sub/Sens controls: The G68 includes a sinewave signal test, to help you set the subwoofer crossover frequencies, or check for room resonances. To avoid possible damage to the speakers the volume is reduced to 50, if necessary, on entering the test.
  • Page 47 C a l i b r a t i n g t h e s y s t e m The display shows: To change the volume • Use the volume keys in the usual way. Sine 80.0Hz To change the input Chan óòô...

  • Page 48: 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 The display shows, for example: This section explains how to use the Sine/Sub/Sens controls to 2.0V Clip -0 adjust the sensitivity of the analogue sources.

  • Page 49: Dsp Presets

    Layout Description Music For music presets: two-channel (eg Trifield) and The G68 Digital Surround Controller provides two types of DSP multichannel (eg Discrete). preset. One set is available if the input is two-channel; eg from a Logic For two-channel movie presets: eg PLIIx Movie.

  • Page 50: Standard Parameters

    The delay of the sides. LipSync 0ms to 30ms The sync. delay. As defined Bypassed The Room Correction profile, or Bypassed for no room correction. *These parameters apply to all DSP presets. †Axis is only available with Meridian DSP loudspeakers.
  • Page 51 The G68 provides several signal processing options for two-channel material. The Music DSP presets are designed for use with music The Music DSP preset is recommended for recordings made with...
  • Page 52 D S P p r e s e t s Ambisonics The fundamental difference between Ambisonics surround sound The Ambisonics DSP preset can decode UHJ format, the two- and conventional stereo is that the signals from all the speakers channel stereo-compatible encoding found on Ambisonically- combine to produce a coherent soundfield at the listening position, recorded discs and broadcasts.
  • Page 53 D S P p r e s e t s 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...
  • Page 54 D S P p r e s e t s Stereo and Direct stability compared with the original Pro Logic decoding. Meridian’s The Stereo preset passes the left and right input signals directly to implementation of Pro Logic IIx uses proprietary code based on 48- the left and right main speakers.
  • Page 55 D S P p r e s e t s 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.
  • Page 56 (such as Dolby Digital) or as discrete channels from a DVD Cinema. player. If you are using Meridian SmartLink then all formats will reach the G68 as discrete channels. With suitable loudspeakers the The multichannel Music presets all use the Music speaker layout G68 can upsample these to provide a more enjoyable surround and the multichannel Movie presets all use the 5.1 Movie speaker...
  • Page 57 D S P p r e s e t s 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 58 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 59: Defining Your Own Presets

    Defining your own presets D S P p r e s e t s The G68 Digital Surround Controller allows you to modify any of Alternatively press V to choose the built-in preset you started the built-in presets, and save them for future use.
  • Page 60 D S P p r e s e t s For example, you could change the name to: Write label Concert for preset ìî ïñ óòô öõú Store • When you have entered the name you want to use press Store. The display shows: Stored ìî...

  • Page 61: Troubleshooting

    If the light still does not illuminate, check any fuses in your power • Observe all units responding correctly. supply and the fuse in the inlet of the G68. If these are all intact, contact your dealer. In extreme cases, the memory of the G68 may have been corrupted.

  • Page 62: Audio Problems

    Auto Configure procedure; see To connect to other • If the G68 seems to be the cause of hum consult your dealer. Meridian G Series, 500 Series, or 800 Series equipment , page 24. • See if the G68 has been set up as Not Controller in the There is radio interference Configuration Menu;...
  • Page 63 There may be a connection problem. Note: There may be a difference between the dynamic range of • In a digital or Meridian feed to the centre, you may have set it the source channel when it is operating, and the noise you hear up to be right instead of left, and therefore it may be playing a in standby.
  • Page 64 The preset changes unexpectedly with a multichannel source FM tuner reception is poor If you are using a non-Meridian source on the MHR SmartLink To obtain high-quality stereo reception on FM a good aerial is input, proprietary data may cause preset switching.

  • Page 65: Maintenance

    • Disconnect the power cord before cleaning the unit. Before replacing a blown fuse, it is best to ascertain the cause of The exterior surfaces of Meridian G Series products are made from the failure. solid anodised aluminium, powder coated steel, thermoplastic rubber, and glass.

  • Page 66: Service And Guarantee

    In case of difficulty outside the UK or USA, contact the importing Outside the UK, local warranty liability is restricted to equipment agent for the territory. A list of Meridian agents outside the UK is purchased within the territory. Our agents outside the UK are only available from Meridian Audio.

  • Page 67: Index

    Index I n d e x Centre (DSP parameter) 46, 47 Channels (DSP parameter) 48 Academy (DSP parameter) 51 Cinema (DSP preset) 52 accessories 5 cleaning 61 active loudspeakers, connecting to 16 COMMS, connecting 25 active subwoofer, connecting to 17 communications connections 24 Ambisonics (DSP preset) 48, 54 Compress (DSP parameter) 54...
  • Page 68 I n d e x DSP parameters DSP presets (continued) Balance 46 Super 48 Bass 46 THX 52, 53 Centre 46 THX Music 53 Depth 46 THX Surround EX 53 LipSync 46 THX Ultra2 Cinema 53 Phase 46 Trifield 47 RC 46 two-channel 47 R Delay 46...
  • Page 69 LipSync (DSP parameter) 46 audio inputs 6 audio outputs 11 communications connections 24 mains fuse, changing 61 specifications 4 Meridian DSP loudspeakers, connecting to 15 tuner connections 24 models 1 video connections 18 Mono (DSP preset) 51 G68XXV 1 Mono Rear (DSP parameter) 49, 51...
  • Page 70 I n d e x presets sources, configuring 32 multichannel 52 speaker layouts 45 standard parameters 46 speakers two-channel 47 configuring 30 user-defining 55 options 31 Pro Logic (DSP parameter) 50 setting up 41 specifications 4 Steered All (DSP parameter) 49, 50, 51 Stereo (DSP preset) 50 RC (DSP parameter) 46 subwoofer crossover frequency 42...
  • Page 71 I n d e x user-defined presets 55 video switching 21, 22 clearing 56 editing name 55 Width (DSP parameter) 47, 48, 49 video connections inputs 20 Yaw (DSP parameter) 49, 51 outputs 20...
  • Page 72 I n d e x...

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