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Grace m906 Owner's Manual
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Grace m906 Owner's Manual

High fidelity 5.1 monitor system
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owner's manual
manual Rev G
main unit firmware Rev 1.08
RCU firmware Rev 1.07
all contents © Grace Design/ Lunatec LLC

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Summary of Contents for Grace m906

  • Page 1 Rev G main unit firmware Rev 1.08 RCU firmware Rev 1.07 all contents © Grace Design/ Lunatec LLC...

  • Page 2: Table Of Contents

    In the event that you encounter any technical or operational difficulties with this or any Grace Design product, please feel free to contact us at 303-443-7454. Our office hours are from 9 to 5, Monday through Friday, MST.

  • Page 3: Important Safety Information

    SeRvice infoRmation The Grace Design m906 contains no user serviceable components. Contact Grace Design for repair and upgrade information. In the event that your Grace Design m906 needs to be returned to the factory, contact us for a return authorization number.

  • Page 4: M906 Key Features

    ConTrol unIT fronT panel headphone power GRACE DESIGN USA HEADPHONE OUTPUT The Audio Control Unit headphone output is provided via a ¼” TRS (Tip, Ring, Sleeve) jack. This output runs parallel with the headphone jack on the remote unit.

  • Page 5: M906 Audio Control Unit Rear Panel

    ConTrol unIT rear panel Left Center Right GRACE DESIGN USA DIGITAL INPUTS / SYNC WORD CLOCK/ GRACE DESIGN AT103 906 DAC SUPERCLOCK load 5.1 DAC OUT 5.1 INPUT 2 THRU ADAT AES3 S/PDIF AES3 x 4 5.1 CR OUT 2...
  • Page 6 2 CH 1 and 2 CH 2 INPUT These are balanced analog stereo XLR inputs. 5.1 BALANCED ANALOG INPUTS This DB25 female connector accepts analog balanced (+4dBu) signals for use as a 5.1 source input. grace design m906 owner’s manual...

  • Page 7: M906 Remote Control Unit

    / edit talkback GRACE DESIGN USA INPUT ANALOG SWITCHES This row of five green LED illuminated switches is for selecting between and monitoring any of the analog sources connected to the m906. INPUT DIGITAL SWITCHES This row of six green LED illuminated switches is for selecting between and monitoring any of the digital sources connected to the m906.
  • Page 8 HEADPHONE AMPLIFIER JACK This ¼” TRS headphone output jack is provided on the remote con- trol unit to access the integrated reference headphone amplifier. REMOTE CONNECTOR This female DB15 connector is used to supply the remote unit with power, headphone signal and serial communication. grace design m906 owner’s manual...

  • Page 9: Unpacking And Installing Your M906 System

    ReGiSteR YoUR Unit Also, we strongly urge you to register your unit with Grace Design. We provide a limited 5 year warranty on all of our products, but if you don’t register your system it’s hard for us to help you if and when help becomes necessary.

  • Page 10: Connecting The M906

    CAM SETTING LINE VOLTAGE FUSE VALUE 100V~ 100V~ 250V~ T 800mA L 120V~ 120V~ 250V~ T 800mA L 220V~ 220V~ 250V~ T 500mA L 240V~ 230V~ 250V~ T 500mA L 240V~ 240V~ 250V~ T 500mA L grace design m906 owner’s manual...
  • Page 11 Warning: A damaged DC power cord can create a shock hazard as Voltages of 72V DC can be present. Do not operate the m906 with a damaged DC power cord. Replace a damaged DC power cord with a replacement from Grace Design (WA047) only. ac PoWeR coRD Now connect the supplied AC cord to the power supply and then to an AC outlet with the supplied AC cable.

  • Page 12: System Connections

    While the serial data can travel several hundred feet we do not recommend cables longer than 50’ for headphone use. Be sure to use the supplied 15 pin cable and not an off the shelf computer video cable. If you need a longer cable contact your Grace Design dealer or call us directly. tB SW jack - The talkback switch input allows the connection of an external switch, such as a foot switch, for remotely activating the talkback mic input on the m906.
  • Page 13 110-ohm termination. These are wired according to the TASCAM pinout as shown in the cable and connector diagram (pp. 36). tB mic inPUt - This is a standard microphone input. It can be used with dynamic or condenser grace design m906 owner’s manual...

  • Page 14: Operating The M906

    *indicates that s-Lock is active SeLectinG a DiGitaL inPUt SoURce The m906 provides the following digital input sources: y 5.1 AES3 5.1 format input using 3 AES3 signals on a DB-25 connector wired to the Tascam standard for 8 grace design m906 owner’s manual...
  • Page 15 The m906 DAC (Digital to Analog Converter) can be referenced to the embedded clock of a connected digital source such as AES3, ADAT, S/PDIF or TOSLINK. The DAC can also be clocked by an external Word grace design m906 owner’s manual...
  • Page 16 Even if the s-Lock does not achieve lock, the digital audio receiver circuits in the m906 can achieve excellent recovered clock jitter performance. SeLectinG SPeakeR oUtPUtS The m906 provides the following speaker output sets: y 5.1 CR OUT 1 (balanced via female DB-25 connector) grace design m906 owner’s manual...
  • Page 17 Press the MON > CUE switch one more time to activate this special mode. y Exit CAL mode by pressing the flashing CAL switch. The MON > CUE switch has now been configured to select a third speaker output set. Note: the physical grace design m906 owner’s manual...
  • Page 18 This will restore the output to the saved preset level. This change will be reflected in the MAIN output level display. The MAIN output level preset can be set in CAL mode (discussed later). grace design m906 owner’s manual...
  • Page 19 4. The channel switches in this mode, unlike normal solo/mute mode, act in an interlocking fashion. This means that once you select a new pair of 5.1 channels to monitor through your headphones, the previous channel selections are automatically turned off. grace design m906 owner’s manual...

  • Page 20: Mono Mode

    (*) to the right of the sample rate. The 5.1 DAC output level is set to 0dB as the default value on a new m906 system, but this can easily be changed in CAL mode (discussed later). mono moDe grace design m906 owner’s manual...
  • Page 21 No problem. Wish you could mute the sub? You got it. Channel solo/mute mode is an easy way to accomplish these types of monitoring ta sks. The channel solo/mute function is provided via a row of seven bi-color, illuminated switches located grace design m906 owner’s manual...
  • Page 22 3. To increase the mic amp gain, rotate the main level encoder in a clockwise direction. As you do this, you’ll see the gain settings change. Preamp gain is adjustable from +30 to +70dB in 3dB steps. Rotate the encoder in a counter- grace design m906 owner’s manual...
  • Page 23 Typical LCD window showing the digital input selected and DAC status information s-Lock status input source selected   sample rate word clock source grace design m906 owner’s manual...

  • Page 24: Advanced Features: Accessing The Cal Modes

    2. Press the switch corresponding to the input source you’d like to calibrate. The switch LED will begin to flash and *input offset* will be displayed in the first line of the LCD screen (see screenshot 7). grace design m906 owner’s manual...
  • Page 25 6. Exit CAL mode and return to the normal operating state by pressing the flashing CAL switch. caLiBRatinG inDiviDUaL SPeakeR oUtPUt cHanneLS offSetS As outlined above, you can edit output levels on a global basis for each speaker set output on the grace design m906 owner’s manual...
  • Page 26 3. “CAL” will be displayed in the headphone level LED display while the current cue output levels will be shown in the ‘main level/edit’ LED window. Cue Output Level will be displayed in the LCD window (screenshot 10). grace design m906 owner’s manual...
  • Page 27 5. If you’d like, you can also edit each of speaker 3’s left/right channel level offsets. To do this, simply press the “left” or “right” solo/mute switch and enter the desired values (screenshot 13). grace design m906 owner’s manual...
  • Page 28 6. Once you’re satisfied with the new DAC output level value for a given channel, you can select another channel to adjust, select a new function to edit or exit CAL mode. grace design m906 owner’s manual...
  • Page 29 CAL switch. 7. Whether you exit CAL mode here or not, the Headphone Output will now be set at the preset level until further changes are made. grace design m906 owner’s manual...
  • Page 30 4. Once you’re satisfied with the new dim setting, you can select a new function to edit or exit CAL mode. 5. Exit CAL mode and return to the normal operating state by pressing the flashing CAL switch. grace design m906 owner’s manual...
  • Page 31 5. Once the desired lock setting is configured, you can select a new function to edit or exit. Exit CAL mode and return to the normal operating state by pressing the flashing CAL switch. grace design m906 owner’s manual...
  • Page 32 The brightness will change in real-time. 6. Once you’re satisfied with the new brightness, you can select a new function to edit or exit. Exit CAL mode and return to the normal operating state by pressing the flashing CAL switch. grace design m906 owner’s manual...

  • Page 33: Cleaning And Maintenance

    (available at the hardware store). Apply cleaner to a clean, dry, lint free cloth and gently wipe all stainless surfaces, taking care not to allow the cleaning product to build up around the panel switches or knobs. grace design m906 owner’s manual...

  • Page 34: Cable And Connector Wiring Diagrams

    END 1 Talkback remote switch diagram Power supply input 6 pin XLR pin 1 +48V pin 2 +24V pin 3 -24V pin 4 +7.5V pin 5 SLEEVE pin 6 SHIELD m906 end Normally open switch grace design m906 owner’s manual...

  • Page 35: M906 Block Diagram

    manual...

  • Page 36: Specifications

    +20dBu imPeDanceS Balanced inputs 30kΩ Unbalanced inputs 50kΩ Balanced outputs (source impedance) 300Ω Balanced outputs min load impedance 1000Ω Headphone out min load impedance 25Ω * available via optional jumper setting, please consult with factory. grace design m906 owner’s manual...
  • Page 37 Power supply unit 1.7” x 8.5” x 8.5” WeiGHt Main chassis 14.1lbs / 6.4kg Remote control unit 2.3lbs / 1kg Power supply unit 6.5lbs / 2.9kg * available via optional jumper setting, please consult with factory. grace design m906 owner’s manual...

  • Page 38: Warranty Information

    InformaTIon • Grace Design warrants all of our products to be free of defective parts and workmanship for a period of five years. • This warranty period begins at the original date of purchase and is transferable to any person who may subsequently purchase the product during this time.

  • Page 39: Manual Revisions

    RCU revision numbers 7/30/07 added revision table 7/30/07 Revised TOC, performed layout tuneup 7/30/07 Included updates for firmware 1.07R 12/14/07 24-33 changed structure of ‘advanced features’ section 12/14/07 changed Main Unit firmware to Rev 1.08 02/27/2009 grace design m906 owner’s manual...

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