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Lexicon MC-12 User Manual

Lexicon mc-12: user guide
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MC-12
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Version 4 EQ
User Guide

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  • Page 1 MC-12 Controller Version 4 EQ User Guide...
  • Page 3 DTS, DTS-ES, Neo:6, and DTS 96/24 are trademarks of Digital Theater Systems, Inc. Service Fax 781-280-0499 email csupport@harmanspecialtygroup.com Lexicon, Logic 7 and the L7 logo are registered trademarks of Harman International Industries, Inc. U.S. Patent Nos. D454,553; D454,860; 5,796,844; 5,870,480 Product Shipments and other worldwide patents issued and pending.
  • Page 4 Introduction DOCUMENTATION CONVENTIONS This document contains general operation instructions for the MC-12 and MC-12 Balanced Digital Controllers. It is important to read this user guide before attempting to use this product. The following symbols are used in this document: Calls attention to a procedure, practice, condition or the like...

  • Page 5: Table Of Contents

    Surround Sound Issues ........1-6 Section 2: Configuring the MC-12 for V4 EQ About Automatic Calibration .

  • Page 7: Section 1: Understanding Room Equalization

    Understanding Room Equalization Loudspeaker Sound in a Room......1-2 Room Modes ........1-5 Surround Sound Issues .

  • Page 8: Loudspeaker Sound In A Room

    UNDERSTANDING ROOM EQUALIZATION Sections one and two of this document explain the conditions that create the need for room equalization, how the MC-12 can com- pensate for room variances, and how to properly set up the micro- phones to run equalization tests. The theoretical material in this section was authored by Dr.
  • Page 9 Version 4 EQ User Guide feet, so it will be scattered by any person (or object bigger than 1 foot) in the room. The strength of reflections also depends on the transmission properties of the reflector. For example, depending on its size and stiffness, a wall may have its own resonant frequency.
  • Page 10 • Seats should be positioned away from walls and corners. Seating positions too close to one or more walls will be subject to bass increases. Lexicon MC-12 Controller...

  • Page 11: Room Modes

    Version 4 EQ User Guide Figure 1-5. Tips for arranging your listening room. ROOM MODES Room modes are resonances that occur when low frequencies rein- force each other as they reflect back and forth between the hard boundaries of the room. The size of the room determines at which particular frequencies it resonates.

  • Page 12: Surround Sound Issues

    Since sound travels a bit faster than 1100 feet per second, each foot of travel takes just under a millisecond. So if one speaker is 5 feet too Lexicon MC-12 Controller...
  • Page 13 Version 4 EQ User Guide close to you, its sound will arrive at your ears approximately 5 mil- liseconds too early. The surround processor distance settings allow the surround sound system to delay the sound from each speaker just enough to realign them all to each other.
  • Page 14 “average” position. Any compromise to accommodate remote seats will degrade the audio for everyone. Figure 1-9. If system is optimized for the remote corner seat, the audio will be degraded for all. Lexicon MC-12 Controller...
  • Page 15 Configuring the MC-12 for V4 EQ About Automatic Calibration ......2-3 Connecting the Microphones ......2-5 Positioning the Microphones for the Microphone Check .

  • Page 17: Section 2: Configuring The Mc-12 For V4 Eq

    Version 4 EQ User Guide ABOUT AUTOMATIC CALIBRATION When running the V4 EQ software, the MC-12 offers automatic calibration of the listening room’s bass response, loudspeaker distances, and loudspeaker output levels. A successful microphone check is required before automatic calibration procedures can be performed.
  • Page 18  Confirms that the microphones are properly connected and functioning.  Calculates an average microphone level, allowing the MC-12 to compensate for individual microphone sensitivities.  Ensures that microphone levels are consistent, eliminating errors that result from individual microphone level differences.

  • Page 19: Connecting The Microphones

    1, 2, 3, and 4 based on the microphone input connector to which the microphone is connected. Label the microphones for troubleshooting purposes. 3. Power on the MC-12 or take the MC-12 out of standby mode. MAIN AUDIO O...

  • Page 20: Positioning The Microphones For The Microphone Check

    Configuring the MC-12 for V4 EQ POSITIONING THE MICROPHONES FOR THE MICROPHONE CHECK Proper microphone placement is essential to achieve the desired automatic calibration results. Refer to the microphone placement examples that begin below to properly position the microphones for the microphone check.
  • Page 21 Side Left Front Left Center Subwoofer Front Configuring the MC-12 for V4 EQ The microphones SHOULD NOT be positioned:  in separate locations  in locations scattered throughout the listening room  in an obstructed line-of-sight path with the loudspeakers...

  • Page 22: Performing The Microphone Check

    MC-12 determines the relative noise level of the listening room and the internal noise level of the microphones. After eliminating microphones that are not detected or not functioning, the MC-12 calculates an average microphone level. SPEAKER SETUP...
  • Page 23 Once a successful microphone check has been performed: • The MC-12 retains the determined microphone level until the SPEAKER SETUP menu is closed. Once this menu is closed, another microphone check is required before automatic calibration can be performed.

  • Page 24: Repositioning The Microphones For Automatic Calibration

    Proper microphone placement is essential to achieve the desired automatic calibration results. Microphone placement determines whether the MC-12 calibrates optimal results for a single listening position; several listening positions in a single row; or several listening positions in the listening room.
  • Page 25 The microphones are clustered in the primary listening position at the approximate spot where the listener’s head will be during listening. As a result, the MC-12 calibrates optimal results for the selected listening position. 2-11...
  • Page 26 The microphones are positioned across a single row at the approximate spots where the listeners’ heads will be during listening. As a result, the MC-12 calibrates optimal results for the selected row at the expense of a single listening position.
  • Page 27 Each microphone is positioned in a single listening position at the approximate spot where the listener’s head will be during listening. As a result, the MC-12 calibrates optimal results for the selected listening area at the expense of a single listening position.
  • Page 28 The microphones are positioned along the perimeter of the listening area, making it difficult for the MC-12 to calibrate optimal results for actual listening positions. In addition, the microphones are positioned in obstructed locations on...
  • Page 29 Front Left Center Subwoofer Front Right Configuring the MC-12 for V4 EQ The microphones SHOULD NOT be positioned:  along the perimeter of the listening positions or listening area  in spots where listeners’ heads will not be during listening...

  • Page 30: Performing Automatic Calibration

    Press the arrow buttons to highlight the desired automatic calibration procedure. Then, press the The !CAUTION! HIGH AUDIO LEVELS screen (shown above) opens on the on-screen display, reminding that the MC-12 outputs loud calibration noise signals during automatic calibration. Press the...
  • Page 31 The SETTING ROOM EQ screen (shown above) opens on the on-screen display while the MC-12 meas- ures the listening room’s bass response. To do this, the MC-12 sends calibration noise signals to the loudspeakers connected to the Main Zone audio output connectors in the order shown on the screen.
  • Page 32 DETAILS EQ DISTANCES LEVELS The AUTO SPEAKER SETUP results screen (shown above) opens on the on-screen display when the MC-12 finishes calibrating loudspeaker output levels. This screen indicates that the ROOM EQ procedure is finished. The AUDIO CONTROLS menu ROOM EQ procedure is automatically set to ON, and the AUDIO CONTROLS menu ROOM EQ LEVEL parameter is automatically set to MEDIUM.

  • Page 33: Troubleshooting

    Troubleshooting • Use the CUSTOM or THX SETUP menu to add the selected loudspeaker to the loudspeaker setup. (The MC-12 does not calibrate for loudspeakers that are not present in the loudspeaker setup.) • Examine connections between the loudspeaker and the associated amplifier to ensure that loudspeaker wires are not crossed.
  • Page 34 Configuring the MC-12 for V4 EQ SET DISTANCES AUTO DISTANCES FRONT LEFT AUTO DISTANCES FRONT LEFT ORIGINAL DISTANCES CENTER FRONT RIGHT SIDE RIGHT 0.0ft 0.0ft 0.0ft REAR RIGHT REAR LEFT SIDE LEFT 0.0ft SUB (MONO) SUB RIGHT 0.0ft 0.0ft 0.0ft 0.0ft...

  • Page 35: Adjusting Room Correction

    When set to ON, the MC-12 applies room correction to the loudspeakers based on the ROOM EQ LEVEL parameter setting. When set to OFF, the MC-12 does not apply room correction to the loudspeakers. This parameter has no affect until the EQ DISTANCES LEVELS or ROOM EQ procedure is performed.

  • Page 36: Remote Control Commands

    The table below lists remote control commands that can be used to adjust the ROOM EQ and ROOM EQ LEVEL parameters when the Zone 2 Command Bank is activated. These commands are additions to the remote control command matrix in the MC-12 User Guide. Button Zone 2 Command Sets the ROOM EQ LEVEL parameter to LOW.

  • Page 37: V4 Eq Menu Trees

    Version 4 EQ User Guide V4 EQ MENU TREES When the MC-12 is running V4 EQ , the menu trees shown in this section replace the AUTO SPEAKER SETUP and AUDIO CONTROLS menu trees shown in the MC-12 User Guide (Rev 2).

  • Page 38: Eq Distances Or Levels

    Configuring the MC-12 for V4 EQ EQ DISTANCES LEVELS MAIN MENU SETUP MODE ADJUST INPUTS SPEAKERS AUDIO CONTROLS SPEAKERS SETUP SETUP REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS SETTING ROOM EQ SETTING DISTANCES FRONT LEFT 0.0ft FRONT LEFT...

  • Page 39: Room Eq

    These settings can be adjusted on the AUDIO CONTROLS menu shown below. GO TO AUDIO CONTROLS HIGH MEDIUM Configuring the MC-12 for V4 EQ AUTO SPEAKER SETUP !CAUTION! HIGH AUDIO LEVELS YOU WILL HAVE 10 SEC TO LEAVE THE ROOM OR...

  • Page 40: Distances Or Output Levels

    Configuring the MC-12 for V4 EQ DISTANCES or OUTPUT LEVELS MAIN MENU SETUP MODE ADJUST INPUTS SPEAKERS AUDIO CONTROLS SPEAKERS SETUP SETUP REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS SETTING DISTANCES FRONT LEFT 0.0ft CENTER 0.0ft FRONT RIGHT 0.0ft...
  • Page 42 3 Oak Park, Bedford, MA, 01730-1413 USA | Telephone: 781-280-0300 | Fax: 781-280-0490 | www.lexicon.com Customer Service: Telephone: 781-280-0300 | Sales Fax: 781-280-0495 | Service Fax: 781-280-0499 Product Shipments: 16 Progress Road, Billerica, MA 01821-5730 USA Part No. 070-15993 | Rev 0 | 05/04...

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Mc-12 v4 eq - rev

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