Lexicon MC-12 Stereo System User Manual
Contents
1. 1 2 ROOMIMOdES 1 5 Surround Sound Issues e es 1 6 Section 2 Configuring the MC 12 for V4 EQ About Automatic Calibration 2 3 Connecting the Microphones 2 5 Positioning the Microphones for the Microphone Check 2 6 Performing the Microphone Check 2 8 Repositioning the Microphones for Automatic Calibration 2 10 Performing Automatic Calibration 2 16 Adjusting Room Correction 2 21 Room EQ esc f daa eee Ho e 2 21 Room s err EI oos 2 21 Remote Control Commands 2 22 Version 4 EQ Menu 2 23 Check Microphones 2 23 EQ Distances or Levels 2 24 Room EQ ovrt OE o ear ate reg EG A 2 25 Audio Controls ses oe aE RR ee 2 25 Distances or Output 1 2 26 1 nderstanding ing Room Equalization Loudspeaker Sound in a 1 2 T V 1 5 Surfound Sound Issues zs s ue eit Sohne ts ale ete se kb daia Bide than 1 6 Understanding Room Equalization 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 co2. MV C 12 Controller Version 4 User Guide 3 Oak Park Bedford MA 01730 1413 USA Tel 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 email csupport harmanspecialtygroup com Product Shipments 16 Progress Road Billerica MA 01821 5730 USA harman specialty group Lexicon Part No 070 15993 Rev 0 05 04 Manufactured under license from Dolby Laboratories Dolby Pro Logic Surround EX and the double D symbol are trademarks of Dolby Laboratories Manufactured under license from THX Ltd U S patent numbers 5 043 970 5 189 703 and or 5 222 059 European patent number 0323830 Other U S and foreign patents pending Ultra2 and THX are trademarks or registered trademarks of THX Ltd Surround EX is a trademark of Dolby Laboratories Used under authorization DTS DTS ES Neo 6 and DTS 96 24 are trademarks of Digital Theater Systems Inc 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 and other worldwide patents issued and pending 2004 Harman International Industries Inc All rights reserved This document should not be construed as a commitment on the part of Harman Specialty Group The information it contains is subject to change without notice Harman Specialty Group assumes no responsibility
3. Once the EQ DISTANCES LEVELS or ROOM EQ procedure has been performed The ROOM EQ parameter is automatically set to ON The ROOM EQ LEVEL parameter is automatically set to MEDIUM These settings can be adjusted on the AUDIO CONTROLS menu shown below Y ON OFF Y 3 0 to 43 0 6 0 to 46 0 2 25 Configuring the MC 12 for V4 EQ DISTANCES or OUTPUT LEVELS gt MODE ADJUST AUDIO CONTROLS SETUP SET DISTANCES AUTO DISTANCES ORIGINAL DISTANCES K R sA n 0 0ft 0 08 0 08 5 yep 0 04 0 08 2 26 SETUP SPEAKER SETUP INPUTS SET CROSSOVERS SPEAKERS CHECK MICROPHONES AUTOMATIC MANUAL REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS SET CROSSOVERS BEFORE CALIBRATING SETTING DISTANCES FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE AUTO DISTANCES FRONT LEFT ERROR CENTER 0 0ft FRONT RIGHT 0 0ft SIDE RIGHT 0 0ft REAR RIGHT 0 0ft REAR LEFT 0 0ft SIDE LEFT 0 0ft SUB MONO 0 0ft SUB RIGHT N A LFE N A SPEAKER OUT OF PHASE SPEAKER SIGNAL TOO LOW SPEAKER UNABLE TO CALCULATE SPEAKER MAY NOT BE ACCURATE AUTO SPEAKER SETUP EQ DISTANCES LEVELS ROOM EQ DISTANCES OUTPUT LEVELS PLACE MICROPHONES AROUND PREFERRED LISTENING POSITIONS SET LEVELS AUTO LEVELS ORIGINAL LEVELS d EN Im 0 0dB 0 048 0 048 c 0 0dB gad pe
4. V S Microphone Right Subwoofer Right 2 6 The microphones SHOULD be positioned as close together as possible relatively centered between and equidistant from the front left and right loudspeakers in a clear line of sight path with the loudspeakers in a location unobstructed by furniture and other fixtures in a location where echoes will not obscure calibration noise signals at least 2 feet 0 61m from all loudspeakers and walls within 30 feet 9 14m of all loudspeakers The listening room to the left shows proper microphone placement for the microphone check The microphones are clustered in an unobstructed location that is relatively centered between and equidistant from the front left and right loudspeakers Version 4 EQ User Guide Configuring the MC 12 for V4 EQ IMPROPER Figure 2 3 Improper microphone placement for the microphone check The microphones SHOULD NOT be positioned X in separate locations X in locations scattered throughout the listening room X inan obstructed line of sight path with the loudspeakers X ina location obstructed by furniture and other fixtures X within 2 feet 0 61m of loudspeakers and walls X more than 30 feet 9 14m from any one loudspeaker The listening room to the left shows improper microphone placement for the microphone check The microphones are scattered throughout the listening room in locations that are neither cent
5. DETECTED Press the 4 and arrow buttons to highlight the desired automatic calibration procedure Then press the arrow button to select this procedure 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 arrow button to continue Note If calibration noise signals become too loud press the arrow button to cancel automatic calibration The TEST WILL BEGIN IN screen shown above opens on the on screen display activating a 10 second countdown until automatic calibration begins To skip the countdown and begin automatic calibration press the arrow button Otherwise the MC 12 automatically begins automatic calibration when the countdown ends During the countdown it is possible to leave the listening room without affecting automatic calibration Return to the listening room about 20 minutes later to avoid interrupting the procedure Version 4 EQ User Guide SETTING DISTANCES FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE DISTANCES or OUTPUT LEVELS This step does not occur during the DISTANCES AUTO DISTANCES FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE 12 0ft 10 5ft 12 0ft 4 5ft ERROR 6 0ft 4 5ft N A N A N A SETTING LEVELS FRONT LEFT CENTER FRONT
6. Lexicon MC 12 Controller Troubleshooting Examine the microphone input connection to ensure that the microphone is properly connected to the MC 12 Make sure the microphone cable plug is fully inserted for a solid connection The microphone may be damaged Contact an authorized Lexicon dealer for assistance Examine the microphone input connection to ensure that the microphone is properly connected to the MC 12 Make sure the microphone cable plug is fully inserted for a solid connection The microphone may be positioned too far from the front loudspeakers Refer to Positioning the Microphones for the Microphone Check page 2 6 to ensure that the microphones are properly positioned for the microphone check The microphone may be damaged Contact an authorized Lexicon dealer for assistance Examine the microphone input connection to ensure that the microphone is properly connected to the MC 12 Make sure the microphone cable plug is fully inserted for a solid connection The microphone may be positioned too far from the front loudspeakers Refer to Positioning the Microphones for the Microphone Check page 2 6 to ensure that the microphones are properly positioned for the microphone check The microphone may be damaged Contact an authorized Lexicon dealer for assistance Eliminate extraneous noises in the listening room including conversations air conditioners and sounds that filter in through open doors and windows The microphone may
7. echoes obscure calibration noise signals Refer to Repositioning the Microphones for Automatic Calibration page 2 10 to ensure that the microphones are properly positioned for automatic calibration Configuring the MC 12 for V4 EQ Lexicon MC 12 Controller SET LEVELS AUTO LEVELS AUTO LEVELS FRONT LEFT ORIGINAL LEVELS CENTER FRONT RIGHT Ke sA op SIDE RIGHT 0 0dB 0 0dB 0 0dB REAR RIGHT SET DISTANCES AUTO DISTANCES AUTO DISTANCES FRONT LEFT ERROR ORIGINAL DISTANCES CENTER 0 0ft FRONT RIGHT 0 0 nq SIDE RIGHT 0 0ft REAR RIGHT 0 0 e REAR LEFT 0 0ft SIDE LEFT 0 0ft 7 SUB MONO 0 0ft Cf ux ys SUB RIGHT N A 0 Xii 004 Xi LFE N A nd Q REAR LEFT 0 0d8 SIDE LEFT sus ica 0 098 0 098 0 048 0 048 LFE DISTANCES or OUTPUT LEVELS EQ DISTANCES LEVELS ROOM EQ When finished viewing the error found in Step 7 press the 4 arrow button to open the SET DIS TANCES or SET LEVELS screen shown above This step does not occur during the ROOM EQ procedure When finished viewing results press the arrow button to return to the AUTO SPEAKER SETUP results screen shown at the top of page 2 18 Press the and arrow buttons to toggle between If desired repeat step 7 EQ DISTANCES LEVELS This step does not occur during the calibrated and original loudspeaker distances or output column page 2 18 to view more detailed results for ROOM
8. 21 Remote Control Commands iiis en 2 22 V4 EQ Menu Trees 2 23 Check Microphones es uai RR Ce R ete ee d AUR RC A 2 23 EQ Distances or Levels i qe d aa eae odas opere Rb 2 24 ROOM EQ 2 28d PR P RR dE OR REP OR EAS 2 25 Audio 4 ERGO eLPUERTEG EE EE 2 25 Distances or Output Levels siseses n 2 26 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 The Automatic Calibration Procedures table on the next page describes all automatic calibration procedures BEFORE performing automatic calibration Use the CUSTOM or THX SETUP menu to set crossover points for the loudspeakers connected to the Main Zone audio output connectors Setting crossover points after automatic calibra tion is performed can invalidate calibrated output levels Set all associated component e g subwoofers loudspeakers and power amplifiers volume controls to a reasonable level During automatic calibration the MC 12 outputs calibration noise signals at fixed volume levels However when automatic calibration ends the MC 12 automatically reverts to the last volume level that was selected before automa
9. These parameters can now be used to activate and deactivate room correction and to control the amount of room correction applied to the loudspeakers Refer to Adjusting Room Correction page 2 21 Calibrates loudspeaker distances 7 Calibrates loudspeaker distances within 0 5 foot 0 15m of the physical distance between the listening position s and the loudspeaker V Provides a comparison between original and calibrated loudspeaker distances allowing for selection of the desired distances Calibrates loudspeaker output levels 7 Calibrates individual loudspeaker output levels within 0 5dB of each other v Calibrates overall loudspeaker output levels within 3 0dB of THX reference levels 75 0dB V Provides a comparison between original and calibrated loudspeaker output levels allowing for selection of the desired output levels Version 4 EQ User Guide CONNECTING THE MICROPHONES Automatic calibration requires the microphones included in the Lexicon Microphone Kit which is available at authorized Lexicon dealers Performing automatic calibration with other microphones will produce unknown results The microphones included in the Lexicon Microphone Kit require careful handling Dropping or otherwise physically abusing the microphones may cause errors during use or irreparable damage to the microphones Read and observe the documentation included with the Lexicon Microphone Kit to ensure optimal microphone performance e Never make
10. be damaged Contact an authorized Lexicon dealer for assistance 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 For best results automatic calibration should be performed with four microphones that have passed the microphone check But the MC 12 performs automatic calibration as long as at least one microphone has passed the microphone check In this case place the successfully checked microphone in the primary listening position 2 10 Version 4 EQ User Guide Configuring the MC 12 for V4 EQ Refer to the microphone placement examples that begin below to properly position the microphones for all automatic calibration procedures PROPER Figure 2 4 Proper microphone placement to achieve the best results for a single lis tening postion The microphones SHOULD be positioned V as close together as possible a single listening position the primary listening position Yat the approximate spot where the listener s head will be during listening in a clear line of sight path with all loudspeakers in a location unobstructed by furniture and other fixtures 4 inalocation where echoes will not obscure calibration noise sig
11. for errors that may appear within this document Introduction Lexicon 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 CAUTION Calls attention to a procedure practice condition or the like that if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Note Calls attention to information that is essential to highlight Eu uu gt Represents a menu path The menu items in gray boxes must be selected with the right arrow button to access the menu or menu item in the black box For instance the SETUP INPUTS and DVD1 menu items must be selected to open the DVD1 INPUT SETUP menu The DVD1 input is used here as an example and will continue to be used as an example throughout this document Whenever it appears as a step in a menu path any other input may be substituted Likewise whenever the DVD1 INPUT SETUP menu appears any other INPUT SETUP menu may be substituted This document uses the term MC 12 to refer to both the MC 12 and MC 12 Balanced Digital Controllers unless otherwise specified MC 12 Version 4 EQ Introduction Section 1 Understanding Room Equalization Loudspeaker Sound in a Room
12. or break microphone input connections unless the MC 12 is powered off using the rear panel power switch or placed in standby mode using the front panel or remote control standby button To connect the microphones 1 Make sure the MC 12 is powered off using the rear panel power switch or placed in standby mode using the front panel or remote control standby button Configuring the MC 12 for V4 EQ Figure 2 1 Microphone input connectors on MC 12 rear panel MAIN AUDIO MICROPHONE INPUTS eq a TRIGGER OUTPUTS Connect the microphones included in the Lexicon Microphone Kit to the microphone input connectors on the MC 12 rear panel shown in Figure 2 1 Make sure microphone cable plugs are fully inserted for solid connections Note During the microphone check the MC 12 refers to the microphones as 1 2 3 and 4 based on the microphone input connector to which the microphone is connected Label the microphones for troubleshooting purposes Power on the MC 12 or take the MC 12 out of standby mode 2 5 Configuring the MC 12 for V4 EQ POSITIONING THE MICROPHONES FOR THE MICROPHONE CHECK Lexicon MC 12 Controller 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 PROPER Figure 2 2 Proper microphone placement for the microphone check
13. that way Every close boundary wall provides a boost in the bass so a speaker placed inappropriately with respect to the wall will produce either insufficient or excessive bass e Seats should be positioned away from walls and corners Seating positions too close to one or more walls will be subject to bass increases Version 4 EQ User Guide Understanding Room Equalization 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 Room modes can cause the sub woofer to sound very loud for one note and fairly quiet for another A typical room will exhibit many room modes For rooms with parallel walls the significant low frequency modes can be pre dicted to occur at any frequency for which an even number of quarter wavelengths will fill the space between two opposite walls For example a room that is 18 feet long will exhibit a resonance along its length at wavelengths of 36 ft 31Hz 18 ft 63Hz 12 ft 94Hz and so on Each dimension of length width and ceiling height will resonate independently at its own frequencies Figure 1 6 Resonance modes along the length of a room The resulting sound in the room is the addition possibly in a com plex mathematical way of all the r
14. values nor a fine enough frequency selection A good parametric equalizer can be made to work but you would first need to have the expertise and equipment to measure the room s resonances This could be a difficult and time consuming task The V4 EQ procedure identifies room resonances and measures both their Q and frequency in a highly precise manner Using this information it then applies the proper parametric filters to neu tralize these resonances You can run the V4 EQ procedure by fol lowing the simple set of instructions in section 2 of this user guide Surround Sound Issues Surround sound is a key component of modern multimedia pre sentations An action movie DVD may have great video but the moving image of an explosion offers little thrill to the viewer with out an accompanying BOOM A tire screeching vehicle entering the field of view from the left is more effective if the accompanying audio comes from the left also The surround sound system is what makes it all work Properly setting up a surround sound system is essential In most installations the seating positions pose a bigger problem than the system setup The two key adjustments for each speaker are timing and level The subtle differences in timing of the sound coming out of each of sev eral speakers is what gives you the listener a sense of direction These subtle timing differences can be as short as a few millisec onds If you are too close to one speaker in t
15. EQ procedure levels The graphics at the bottom of the on screen the other procedure display update to reflect the selected values When the desired loudspeaker distances or output When finished viewing results press the arrow This step does not occur during the levels are selected press the arrow button to button to return to the SPEAKER SETUP menu ROOM EQ procedure apply these values A confirmation message appears on the on screen display indicating that the selected values have been applied to the loudspeakers The SPEAKER DISTANCES menu MAIN MENU gt SETUP SPEAKERS MANUAL can be used to manually adjust loudspeaker distances The SPEAKER SETUP SPEAKERS MANUAL b de LEVEL ADJUST menu can be used to manually adjust can be used to manually adjust loudspeaker distances The SPEAKER loudspeaker one levels bid to the MC 12 User LEVEL ADJUST menu can be used to manually adjust Guide for additional information loudspeaker output levels Refer to the MC 12 User Guide for additional information The SPEAKER DISTANCES menu MAIN MENU 2 20 Version 4 EQ User Guide Note Once automatic calibration has been performed use the BASS PEAK LIMITERS menu to set amplitude limits for low frequency signals sent to the Main Zone audio output connectors labeled Subwoofer L R and LFE and redirected to other output connectors ADJUSTING ROOM CORRECTION Performing the EQ DISTANCES LEVELS
16. RATING SETTING LEVELS FRONT LEFT 0 0dB CENTER 0 0dB FRONT RIGHT 0 0dB SIDE RIGHT 0 0dB REAR RIGHT 0 0dB REAR LEFT 0 0dB SIDE LEFT 0 0dB SUB MONO 0 0dB SUB RIGHT N A LFE N A AUTO SPEAKER SETUP EQ DISTANCES LEVELS ROOM EQ DISTANCES OUTPUT LEVELS PLACE MICROPHONES AROUND PREFERRED LISTENING POSITIONS AUTO SPEAKER SETUP DISTANCES ERROR LEVELS ERROR ROOM EQ DONE AUTO VALUES APPLIED PRESS gt TO VIEW DETAILS AUTO SPEAKER SETUP ICAUTION HIGH AUDIO LEVELS AUTO SPEAKER SETUP TEST WILL BEGIN IN 10 YOU WILL HAVE 10 SEC TO LEAVE THE ROOM OR SIT QUIETLY PRESS gt TO SKIP COUNTDOWN PRESS gt TO BEGIN COUNTDOWN AUTO SPEAKER SETUP DISTANCES LEVELS ROOM EQ DONE AUTO VALUES APPLIED PRESS gt TO VIEW DETAILS LEVELS DISTANCES AUTO DISTANCES SPEAKER AUTO LEVELS SPEAKER FRONT LEFT ERROR dd N FRONT LEFT ERROR e SPAR OUTPUT TOO HIGH CENTER 0 0ft 1 Highlight the desired automatic calibration procedure CENTER FRONT RIGHT 0 0ft SPEAKER DISTANCES or LEVELS FRONT RIGHT SPEAKER SIDE RIGHT 0 0ft SIGNAL TOO LOW SIDE RIGHT SPKR OUTPUT TOO LOW 2 Press the arrow button to view more detailed results REAR RIGHT 0 0ft REAR LEFT 0 0ft SIDE LEFT 0 0ft SUB MONO 0 0ft SUB RIGHT N A LFE N A SPEAKER UNABLE TO CALCULATE SPEAKER MAY NOT BE ACCURATE for that procedure Selecting DISTANCES opens the AUTO DISTANCES menu shown to the lef
17. RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE AUTO LEVELS FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE 2 0dB ERROR 2 0dB 4 5dB 3 00B 3 0dB 4 5dB N A N A N A EQ DISTANCES LEVELS Configuring the MC 12 for V4 EQ SETTING ROOM EQ FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE gt SU FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE ROOM EQ 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 The cursor automatically scrolls downward highlighting each parameter while the MC 12 applies appropriate room corrections to the corresponding loudspeaker When finished the MC 12 enters SET to the right of the parameter label or OUTPUT LEVELS procedures This step does not occur during the ROOM EQ procedure The SETTING DISTANCES or SETTING LEVELS screen shown above opens on the on screen display while the MC 12 calibrates loudspeaker distances or output levels To do this the MC 12 sends calibration noise signals to the loudspeakers connected to the Main
18. Zone audio output connectors in the order shown on the screen The cursor automatically scrolls downward highlighting each parameter while the MC 12 calculates a distance or output level for the corresponding loudspeaker When finished the MC 12 enters the calculated value or ERROR to the right of the parameter label Note the following During the EQ DISTANCES LEVELS procedure the SETTING DISTANCES screen opens on the on screen display while the MC 12 calibrates loudspeaker distances Then the SETTING LEVELS screen opens on the on screen display while the MC 12 calibrates loudspeaker output levels In most listening rooms low frequency signal propagation makes automatic loudspeaker distance calibration unreliable for subwoofers and LFE subwoofers Because of this the MC 12 does not send calibration noise signals to subwoofers Instead the MC 12 calibrates these loudspeaker distances to the average distance of the front left and right loudspeakers If desired the SPEAKER DISTANCES menu can be used to manually adjust subwoofer distances Configuring the MC 12 for V4 EQ AUTO DISTANCES AUTO LEVELS FRONT LEFT 12 0ft FRONT LEFT CENTER 10 5ft CENTER FRONT RIGHT 12 0ft FRONT RIGHT SIDE RIGHT 4 5ft SIDE RIGHT REAR RIGHT ERROR REAR RIGHT REAR LEFT 6 0ft REAR LEFT SIDE LEFT 4 5ft SIDE LEFT SUB MONO SUB MONO SUB RIGHT SUB RIGHT LFE LFE DISTANCES or OUTPUT LEVELS The AUTO DISTANCES or AUTO LEVELS screen shown above opens only if th
19. antage of the room However they do not know the specifics of your particular room how big it is the arrangement of the fur niture speaker placement and so on Designers can correct for some speaker characteristics For exam ple a typical cone driver does not radiate all frequencies evenly in all directions With a floorstanding speaker designers know how far above the floor each driver in the speaker will be With this knowl edge they can specify details such as how far from a wall or corner their speaker should be placed However they must still design to some typical room Your room might be quite different from what is thought to be typical Getting good sound in your room requires that you try to avoid setting it up in a manner that will create problems the speaker designer could not anticipate Following are some tips for arrang ing your listening room for optimal enjoyment see Figure 1 5 e f the room is still under construction you should try to avoid building large enclaves or rectangular cavities such as foyers bay windows stairway entrances and so on Such spaces res onate specific frequencies and affect the sound quality within the room e not to place speakers in cabinets or build them into walls unless the manufacturer has specified them for such applica tions e Speakers designed to be freestanding should be used that way likewise those designed to be set against a wall or in a corner should be used
20. crophone passed the microphone check e ERROR indicates that the microphone did not pass the microphone check Press the and arrow buttons to highlight the desired microphone Press the arrow button to view more detailed results for the selected microphone The CHECK MICROPHONES Results table on the next page describes all possible results 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 Configuring the MC 12 for V4 EQ Do not disconnect the microphones from the microphone input connectors If the microphones are disconnected perform the microphone check again before performing automatic calibration Configuring the MC 12 for V4 EQ Result MICROPHONE OK MICROPHONE NOT DETECTED MICROPHONE SIGNAL TOO LOW MICROPHONE OUT OF RANGE MICROPHONE TOO MUCH ROOM NOISE Description The microphone detected calibration noise signals without error The MC 12 did not detect the microphone during the silence check The microphone level determined during the silence check was not confirmed during the microphone check The microphone level is more than 20dB below the highest microphone level The microphone level could not be determined because of excessive noise in the listening room
21. e 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 Version 4 EQ User Guide PROPER Figure 2 6 Proper microphone placement to achieve the best results for several lis tening positions within the listening room S Microphone Right Subwoofer Front Right Configuring the MC 12 for V4 EQ The microphones SHOULD be positioned in single listening positions within the listening room at the approximate spots where the listeners heads will be during listening in a clear line of sight path with all loudspeakers in a location unobstructed by furniture and other fixtures in a location where echoes will not obscure calibration noise signals at least 2 feet 0 61m from all loudspeakers and walls within 30 feet 9 14m of all loudspeakers The listening room to the left shows proper microphone placement for automatic calibration to achieve the best results for several listening positions in the listening room 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 2 13 Configuring the MC 12 for V4 EQ IMPROPER Figure 2 7 Improper microphone placement for automatic calibratio
22. e set to this point Understanding Room Equalization When a room has multiple viewing positions the distance and level settings will be more accurate if all of those seats are clustered together as closely as possible Figure 1 8 Figure 1 8 Seats should be clustered together as much as possible If a favorite listening chair must be located in a remote corner of the room Figure 1 9 the listeners will have to choose whether to accomodate the remote seat or to ignore it No set of values will 1 7 Understanding Room Equalization work perfectly for everyone if one or more seats are too far away from the 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 2 Configuring the MC 12 for V4 EQ About Automatic 2 3 Connecting the Microphones 2 5 Positioning the Microphones for the Microphone Check 2 6 Performing the Microphone Check 2 8 Repositioning the Microphones for Automatic Calibration 2 10 Performing Automatic Calibration 2 16 Adjusting Room 2 21 ROOI EQ gop Sp t 4 aa f aree at eiit 2 21 Room EQ Level nsa am Eb RAH ERA e ETE 2
23. e wave will pass around the object as if it wasn t there If the wavelength is shorter strong reflections will occur For exam ple the wavelength of 100Hz is 11 feet so it will pass around any person standing in a room The wavelength of 1000Hz is only 1 1 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 This can happen when a sound wave of sufficient amplitude hits the wall and causes it to resonate Parallel walls can reflect sound back and forth many times as shown in Figure 1 3 When multiple copies of the same waveform are added together they do not necessarily produce louder sound Multiple reflections could cause an increase of more than 10dB Yet the level could be reduced by 10dB or more The relative timing between the two sounds phase difference determines what actually happens The end result of all these reflections is that you hear an extremely complicated sum that cannot be easily char acterized Fortunately our ears actually our brains are able to sort through the resultant sound and interpret it all as the room sound As we get accustomed to the room sound reflections they become a critical part of our enjoyment of most music Without the room reflections most people wou
24. ening room to the left shows improper microphone placement for the automatic calibration The microphones are positioned in obstructed locations on seat cushions rather than in spots where listeners heads will be during listening Configuring the MC 12 for V4 EQ Lexicon MC 12 Controller PERFORMING AUTOMATIC CALIBRATION MAIN MENU MODE ADJUST AUDIO CONTROLS SETUP AUTO SPEAKER SETUP CAUTION HIGH AUDIO LEVELS AUTO SPEAKER SETUP__ TEST WILL BEGIN IN 10 gt SETUP gt SPEAKER SETUP AUTO SPEAKER SETUP INPUTS SET CROSSOVERS EQ DISTANCES LEVELS SPEAKERS CHECK MICROPHONES ROOM EQ AUTOMATIC DISTANCES MANUAL OUTPUT LEVELS REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS YOU WILL HAVE 10 SEC PRESS gt TO SKIP TO LEAVE THE ROOM OR COUNTDOWN SIT QUIETLY SET CROSSOVERS PLACE MICROPHONES BEFORE CALIBRATING AROUND PREFERRED LISTENING POSITIONS PRESS gt BEGIN COUNTDOWN Follow the instructions in the appropriate table column below to perform the desired automatic calibration procedure Step 1 2 16 DISTANCES or OUTPUT LEVELS EQ DISTANCES LEVELS ROOM EQ Open the AUTO SPEAKER SETUP menu as shown above MIC CHECK REQUIRED The AUTO SPEAKER SETUP menu is not available unless a successful microphone check has been performed If one of the error messages shown to the right appears on the on screen display refer to Performing the Microphone Check page 2 8 NO MICROPHONES
25. ere is an error during loudspeaker distances or output levels calibration Otherwise the MC 12 skips to Step 9 This screen provides the results for each loudspeaker A value indicates that no errors occurred during calibration An ERROR indicates that although a value was calculated at least one error occurred during calibration Press the a and arrow buttons to highlight the desired loudspeaker Then press the arrow button to view more detailed results for the selected loudspeaker The DISTANCES and OUTPUT LEVELS Results table on the next page describes all possible results AUTO SPEAKER SETUP DISTANCES ERROR LEVELS OK ROOM EQ DONE AUTO VALUES APPLIED PRESS gt TO VIEW 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 These parameters can now be used to activate and deactivate room correction and to control the amount of room correction applied to the loudspeakers Refer to Adjusting Room Correction page 2 21 This screen also provides the results for the DISTANCES and LEVELS procedures OK indicates that no errors occurred during calibration ERROR ind
26. ered between nor equidistant from the front left and right loudspeakers In addition the Fr nt microphones are positioned in obstructed locations on the floor and on seat cushions Microphone Right Subwoofer Configuring the MC 12 for V4 EQ Lexicon MC 12 Controller PERFORMING THE MICROPHONE CHECK CHECK MICROPHONES M Sula CHECKING FOR SILENCE MAIN MENU gt SETUP gt SPEAKER SETUP CHECK MICROPHONES MODE ADJUST INPUTS SET CROSSOVERS GROUP MICROPHONES SPEAKERS CHECK MICROPHONES INTO A BUNDLE IN THE REAR PANEL CONFIG AUTOMATIC MIDDLE OF THE ROOM CHECKING MICROPHONES AUDIO CONTROLS SETUP PLEASE WAIT PLEASE WAIT DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS MANUAL PRESS gt TO SET CROSSOVERS BEGIN MIC CHECK BEFORE CALIBRATING 1 Open the SPEAKER SETUP menu as shown above The CHECKING MICROPHONES message shown above appears on the on screen display while the MC 12 confirms the microphone level calculated during the silence check To do this the MC 12 sends alternating calibration noise signals to the front left and right loudspeakers eliminating microphones 2 Press the and arrow buttons to highlight the CHECK MICROPHONES procedure Then press the gt arrow button to begin this procedure that detect the signal at an unusually low or high level Then the MC 12 determines the appropriate output level for the 3 The CHECK MICROPHONES screen shown above opens on calibrati
27. gh a layer of gauze You might try to fix things by turning up the overall vol ume turning down the overall volume or by tweaking your audio controls bass treble tilt EQ or loudness However none of these fixes can provide satisfactory results For example turning down the bass sufficiently to solve the problem with the kick drum will probably leave all the low frequencies seemingly too low in ampli tude By comparison were you to listen to the same recording through headphones headphones eliminate room modes since they are tightly coupled to the ear you wouldn t have the prob lem You might then describe the sound of the same recording played back in your room as having flabby bass and assume the cause is your system or your speakers In fact if you are really hear ing room modes the flabby bass is not caused by your speakers it is caused by your room The too slow decay of a resonance mode can be corrected only by applying the proper filter The severity of a resonance mode is defined by its Q value which historically meant Quality Factor The higher the Q of a resonance the bigger its amplitude and the slower its decay 1 6 Lexicon MC 12 Controller The presence of a resonance with high Q is not a desirable condi tion in listening rooms Proper treatment of a resonance requires a filter with not only the correct frequency and depth but also the correct Q Graphic equalizers offer neither a variety of Q
28. guring the MC 12 for V4 EQ Lexicon MC 12 Controller 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 D Sets the ROOM EQ LEVEL parameter to LOW Sets the ROOM EQ LEVEL parameter to MEDIUM Sets the ROOM EQ LEVEL parameter to HIGH Sets the ROOM EQ LEVEL parameter to MAX Sets the ROOM EQ parameter to ON D Sets the ROOM EQ parameter to OFF 2 22 Version 4 EQ User Guide V4 EQ MENU TREES Configuring the MC 12 for V4 EQ 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 12 User Guide Rev 2 CHECK MICROPHONES MAIN MENU SETUP MODE ADJUST INPUTS AUDIO CONTROLS SPEAKERS SETUP REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS AUTO SPEAKER SETUP EQ DISTANCES LEVELS ROOM EQ DISTANCES OUTPUT LEVELS PLACE MICROPHONES AROUND PREFERRED LISTENING POSITIONS When all microphones pass the microphone check SPEAKER SETUP SET CROSSOVERS CHECK MICROPHONES AUTOMATIC MANUAL SET CROSSOVERS BEFORE CALIBRATING SPEAKER SETUP SET CROSSOVERS CHECK MICROPHONES AUTOMATIC MANUAL SET CROSSOVERS BEFORE CALIBRATING pressing the arr
29. he microphones may be positioned too far from the selected loudspeaker or in a location where echoes obscure calibration noise signals Refer to Repositioning the Microphones for Automatic Calibration page 2 10 to ensure that the microphones are properly positioned for automatic calibration Examine microphone input connections to ensure that the microphones are properly connected to the MC 12 Make sure microphone cable plugs are fully inserted for solid connections Refer to Repositioning the Microphones for Automatic Calibration page 2 10 to ensure that the microphones are properly positioned for automatic calibration Examine microphone input connections to ensure that the microphones are properly connected to the MC 12 Make sure microphone cable plugs are fully inserted for solid connections Refer to Repositioning the Microphones for Automatic Calibration page 2 10 to ensure that the microphones are properly positioned for automatic calibration Decrease associated amplifier volume levels including built in subwoofer amplifiers The microphones may be positioned too close to the selected loudspeaker Refer to Repositioning the Microphones for Automatic Calibration page 2 10 to ensure that the microphones are properly positioned for automatic calibration Increase associated amplifier volume levels including built in subwoofer amplifiers The microphones may be positioned too far from the selected loudspeaker or in a location where
30. he system many of the audio effects will seem to come from only that direction because the sound from that speaker arrives at your ears too early 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 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 Levels must also be balanced because a speaker positioned too close to you will be too loud compared to the other speakers Perfect settings for level and distance apply to only one position in the room For example if one seat is 8 feet from every speaker in the room no other location in the room will also be exactly 8 ft from them all A seat to the left of that first one might be 3 feet closer to the left side speaker and the same amount further away from the right side speaker No single set of distances will fit both seat positions Fortunately our perception will tolerate some devi ation from perfect level and distance settings In Figure 1 7 the distance value for the side speakers is set to a location about mid way between the two seats giving an error of only 1 5 feet for both side speakers for both seats Figure 1 7 Distance setting point for side speakers should b
31. hone level allowing the MC 12 to compensate for individual microphone sensitivities V Ensures that microphone levels are consistent eliminating errors that result from individual microphone level differences Calibrates the listening room s bass response loudspeaker distances and loudspeaker output levels 7 Requires minimal interaction V Measures the listening room s bass resonance characteristics V Applies appropriate room correction to the loudspeakers to minimize bass resonances V Sets the AUDIO CONTROLS menu ROOM EQ parameter to ON and ROOM EQ LEVEL parameter to MEDIUM These parameters can now be used to activate and deactivate room correction and to control the amount of room correction applied to the loudspeakers Refer to Adjusting Room Correction page 2 21 7 Calibrates loudspeaker distances within 0 5 foot 0 15m of the physical distance between the listening position s and the loudspeaker 7 Calibrates individual loudspeaker output levels within 0 5dB of each other 7 Calibrates overall loudspeaker output levels within 3 0dB of THX reference levels 75 0dB 7 Automatically applies calibrated loudspeaker distances and output levels Calibrates the listening room s bass response V Measures the listening room s bass resonance characteristics V Applies appropriate room correction to the loudspeakers to minimize bass resonances V Sets the AUDIO CONTROLS menu ROOM EQ parameter to ON and ROOM EQ LEVEL parameter to MEDIUM
32. icates that although a value was calculated at least one error occurred during calibration Press the 4 and arrow buttons to highlight the desired procedure Then press the arrow button to open the AUTO DISTANCES or AUTO LEVELS screen Follow the instructions in the column to the left to view more detailed results for individual loudspeakers Lexicon MC 12 Controller ROOM EQ DONE PRESS gt TO CONTINUE ROOM EQ APPLIED TO ADJUST GO TO AUDIO CONTROLS ROOM EQ The ROOM EQ DONE screen shown above opens on the on screen display when the MC 12 finishes applying room correction to the loudspeakers This screen indicates that the ROOM EQ procedure is finished The AUDIO CONTROLS menu ROOM EQ parameter is automatically set to ON and the AUDIO CONTROLS menu ROOM EQ LEVEL parameter is automatically set to MEDIUM These parameters can now be used to activate and deactivate room correction and to control the amount of room correction applied to the loudspeakers Refer to Adjusting Room Correction page 2 21 Version 4 EQ User Guide DISTANCES and OUTPUT LEVELS Results Result SPEAKER OK SPEAKER IS NOT ENABLED SPEAKER OUT OF PHASE SPEAKER SIGNAL TOO LOW SPEAKER UNABLE TO CALCULATE SPEAKER MAY NOT BE ACCURATE SPEAKER SPKR OUTPUT TOO HIGH SPEAKER SPKR OUTPUT TOO LOW Description The MC 12 calibrated the distance or output level of the selected loudspeaker without erro
33. ld find the perceived audio quite uninteresting even unpleasant Logic 7 recreates these reflections Understanding Room Equalization Figure 1 3 Parallel walls reflect sound multiple times If you can imagine sound waves as moving objects it is easier to think about how they interact with common objects such as humans and furniture The wavelength of audible sound can be as long as 57 ft 20Hz or as short as 2 3 of an inch 20kHz A 1kHz sound wave will be about a foot long when it leaves the speaker and it will bounce off of almost everything solid people walls fur niture in its path A 100Hz sound wave will be 11 feet long after leaving the speaker and because of its length won t bounce off of nearly as many surfaces as the 1kHz sound wave This concept is shown in Figure 1 4 1 3 Lexicon MC 12 Controller Understanding Room Equalization X Reflected waves SS ws aN S RN Direct waves The low frequencies tend to behave in predictable ways because the bass wavelengths are larger than the typical objects in a room The mid and high frequencies generally behave differently from room to room because the foot by foot or inch by inch details dif fer dramatically from room to room No two rooms have the same exact placement of chairs tables lamp shades bookshelves or people Good speaker designers know that there are differences from one room to another and try to develop speaker systems that take adv
34. m 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 James Muller Lexicon senior software engineer LOUDSPEAKER SOUND IN A ROOM The way that sound from a speaker behaves outdoors in open air or in an anechoic chamber is different from the way it behaves in a room The sound from a speaker in open air or in an anechoic chamber radiates outward in straight lines Actually the theory of wave propagation is quite complex but the straight line concept is valid for uniform air properties and is therefore accurate enough to be useful In a typical listening room a small amount of the sound reaches the listener directly as shown in Figure 1 1 Figure 1 1 The listener directly hears a fraction of the total sound Lexicon MC 12 Controller Most of the sound in a room is reflected off walls the floor and the ceiling as shown in Figure 1 2 Figure 1 2 The listener hears mostly reflected sound In addition a typical listening room also contains furniture win dows door openings and people Every object and surface con tributes a reflection The strength of each reflection depends on how the wavelength of the sound compares to the size of the reflecting object and on the transmission properties of the reflector A good general principle to remember is that if the wavelength is longer than the size of the object th
35. n Microphone Right Subwoofer Front Right Lexicon MC 12 Controller The microphones SHOULD NOT be positioned X along the perimeter of the listening positions or listening area X in spots where listeners heads will not be during listening X inan obstructed line of sight path with the loudspeakers X ina location obstructed by furniture and other fixtures X within 2 feet 0 61m of loudspeakers and walls X more than 30 feet 9 14m from any one loudspeaker The listening room to the left shows improper microphone placement for the automatic calibration 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 the floor Version 4 EQ User Guide Configuring the MC 12 for V4 EQ IMPROPER Figure 2 8 Improper microphone placement for automatic calibration S Microphone Right Subwoofer Front Right The microphones SHOULD NOT be positioned X along the perimeter of the listening positions or listening area in spots where listeners heads will not be during listening X inan obstructed line of sight path with the loudspeakers X ina location obstructed by furniture and other fixtures X within 2 feet 0 61m of loudspeakers and walls X more than 30 feet 9 14m from any one loudspeaker The list
36. nals V atleast 2 feet 0 61m from all loudspeakers and walls V within 30 feet 9 14m of all loudspeakers Microphone The listening room to the left shows proper microphone placement for automatic calibration to achieve the best results for a single listening position 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 Configuring the MC 12 for V4 EQ PROPER Figure 2 5 Proper microphone placement to achieve the best results for several lis tening positions in a single row S Microphone Subwoofer Lexicon MC 12 Controller The microphones SHOULD be positioned V across a single row of listening positions at the approximate spots where the listeners heads will be during listening in a clear line of sight path with all loudspeakers in a location unobstructed by furniture and other fixtures in a location where echoes will not obscure calibration noise signals at least 2 feet 0 61m from all loudspeakers and walls within 30 feet 9 14m of all loudspeakers The listening room to the left shows proper microphone placement for automatic calibration to achieve the best results for several listening positions in a single row The microphones are positioned across a single row at the approximate spots where th
37. npo 0 008 0 048 0 098 0 098 AUTO SPEAKER SETUP CAUTION HIGH AUDIO LEVELS YOU WILL HAVE 10 SEC TO LEAVE THE ROOM OR SIT QUIETLY PRESS gt TO BEGIN COUNTDOWN SETTING LEVELS FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE AUTO LEVELS FRONT LEFT ERROR CENTER 0 0dB FRONT RIGHT 0 0dB SIDE RIGHT 0 0dB REAR RIGHT 0 0dB REAR LEFT 0 0dB SIDE LEFT 0 0dB SUB MONO 0 0dB SUB RIGHT N A LFE N A Lexicon MC 12 Controller AUTO SPEAKER SETUP TEST WILL BEGIN IN 10 PRESS gt TO SKIP COUNTDOWN 6 SPEAKER SPKR OUTPUT TOO HIGH SPEAKER SPKR OUTPUT TOO LOW jexicon 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 harman specialty group Part No 070 15993 Rev 0 05 04
38. on noise signal used during automatic calibration the on screen display emphasizing the importance of proper microphone placement to achieve the desired automatic calibration results Note The MC 12 outputs calibration noise signals between 55 and 954GB starting at 55dB and increasing 5dB increments until the microphones detect the required level If calibration noise signals become too loud press the arrow button to cancel automatic calibration Refer to Positioning the Microphones for the Microphone Check page 2 6 to ensure that the microphones are properly posi tioned for the microphone check Then press the arrow button to continue The CHECKING FOR SILENCE message shown above appears on the on screen display while the 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 Version 4 EQ User Guide The CHECK MICROPHONES results CHECK MICROPHONES screen shown to the right opens on MIC 1 the on screen display when the MC 12 finishes checking the microphones This MIC 4 screen provides the results for each TES DUE microphone The MC 12 refers to the DETAILS PRESS lt TO CONTINUE microphones as 1 2 3 and 4 based on the microphone input connector to which the microphone is connected e indicates that the mi
39. oom s modes Other factors such as wall stiffness or the position of furniture in the room can also affect the modes At higher frequencies these effects become less predictable and can change as people move around the room However the low frequency modes are predictably consistent Any problems produced by the low frequency modes will always be present but those problems can be mitigated 1 5 Understanding Room Equalization Room modes affect the frequency response you hear in several ways The most pronounced effect of room modes is to make cer tain frequencies too loud You can correct this to some degree with an equalizer Strong resonances have an additional feature those frequencies linger on When a speaker creates sound at the fre quency of a strong resonance mode that sound lingers in the room after the speaker has stopped vibrating For a very strong reso nance the sound could linger as long as half a second In the worst cases that sound will also have a distinct pitch Listeners do not always notice this extra sound because the fre quencies of stable modes are usually too low to be discernible as a detail unless the listener specifically listens for them Rather the usual problem is that the lingering sound can obscure other parts of the music For example the lingering sound from a kick drum could mask the details of a following vocal passage Subjectively you might feel as if you were listening to the music throu
40. or ROOM EQ procedure enables the AUDIO CONTROLS menu ROOM EQ and ROOM EQ LEVEL parameters which can be used to activate and deactivate room correction and to control the amount of room correction applied to the loudspeakers Note Performing the EQ DISTANCES LEVELS or ROOM EQ procedure automatically sets the ROOM EQ parameter to ON and the ROOM EQ LEVEL parameter to MEDIUM the recommended setting Configuring the MC 12 for V4 EQ ROOM EQ ON OFF Activates and deactivates the room correction that was applied to the loudspeakers during the EQ DISTANCES LEVELS or ROOM EQ procedure 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 ROOM EQ LEVEL MAX HIGH MEDIUM LOW Controls the amount of room correction applied to the loudspeakers when the ROOM EQ parameter is set to ON This parameter has no effect when the ROOM EQ parameter is set to OFF The ROOM EQ LEVEL parameter can be adjusted in four increments with MAX applying the greatest amount of room correction to the loudspeakers and LOW applying the least amount of room correction to the loudspeakers Setting this parameter is a matter of personal taste as the effect of each setting varies among input sources and listening rooms 2 21 Confi
41. ow button opens the AUTO SPEAKER SETUP menu When at least one of the microphones does not pass the microphone check pressing the arrow button opens the SPEAKER SETUP menu yp MICROPHONE CHECK MICROPHONES GROUP MICROPHONES INTO A BUNDLE IN THE MIDDLE OF THE ROOM PLEASE WAIT CHECK MICROPHONES CHECKING FOR SILENCE PRESS gt BEGIN MIC CHECK CHECK MICROPHONES MIC 1 ERROR MIC 2 OK MIC 3 OK MICROPHONE MIC 4 OK SIGNAL TOO LOW MICROPHONE NOT DETECTED PRESS TO VIEW DETAILS PRESS TO CONTINUE MICROPHONE OUT OF RANGE MICROPHONE TOO MUCH ROOM NOISE OK When the CHECK MICROPHONES results screen opens press the 4 and arrow buttons to select the desired microphone parameter Then press the gt arrow button to view more detailed microphone check results for the selected microphone P Susi CHECKING MICROPHONES PLEASE WAIT 2 23 Lexicon MC 12 Controller Configuring the MC 12 for V4 EQ EQ DISTANCES LEVELS MAIN MENU gt SETUP MODE ADJUST INPUTS SPEAKERS AUDIO CONTROLS SETUP REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS SETTING ROOM EQ FRONT LEFT FRONT LEFT CENTER CENTER FRONT RIGHT FRONT RIGHT SIDE RIGHT SIDE RIGHT REAR RIGHT REAR RIGHT REAR LEFT REAR LEFT SIDE LEFT SIDE LEFT SUB MONO SUB MONO SUB RIGHT SUB RIGHT LFE LFE SPEAKER SETUP SET CROSSOVERS CHECK MICROPHONES AUTOMATIC MANUAL SET CROSSOVERS BEFORE CALIB
42. r The selected loudspeaker is not present in the loudspeaker setup according to the CUSTOM or THX SETUP menu The calibrated distance is accurate but the microphones detected out of phase calibration noise signals The microphones detected calibration noise signals at unusually low levels The microphones did not detect calibration noise signals so the MC 12 could not calibrate the distance of the selected loudspeaker At least one of the microphones did not detect calibration noise signals at reasonable levels As a result the distance calibrated for the selected loudspeaker may not be accurate The microphones detected calibration noise signals at unusually high levels The microphones detected calibration noise signals at unusually low levels Configuring the MC 12 for V4 EQ Troubleshooting N A 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 If the wiring is correct the error message can be ignored Some loudspeaker models will report a phase error even if no phase error exists Dipolar loudspeakers may produce this error However the MC 12 does not report the error unless at least half of the microphones detect out of phase calibration noise signals T
43. t Selecting LEVELS opens the AUTO LEVELS menu shown to the right REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE 2 24 Version 4 EQ User Guide ROOM EQ MAIN MENU MODE ADJUST AUDIO CONTROLS SETUP SETTING ROOM EQ FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE AUDIO CONTROLS SETUP INPUTS SPEAKERS REAR PANEL CONFIG DISPLAYS VOLUME CONTROLS TRIGGERS LOCK OPTIONS SETTING ROOM EQ FRONT LEFT CENTER FRONT RIGHT SIDE RIGHT REAR RIGHT REAR LEFT SIDE LEFT SUB MONO SUB RIGHT LFE AUDIO CONTROLS 55 50 048 TREBLE TILT EQ LOUDNESS BALANCE FADER ZONE2 BALANCE RECORD BALANCE ROOM EQ 0 00B 0 00B OFF lt l gt lt l gt lt l gt lt l gt ON ROOM EQ LEVEL MEDIUM iz SPEAKER SETUP SET CROSSOVERS CHECK MICROPHONES AUTOMATIC MANUAL SET CROSSOVERS BEFORE CALIBRATING gt PRESS gt TO CONTINUE ROOM EQ APPLIED TO ADJUST GO TO AUDIO CONTROLS AUTO SPEAKER SETUP EQ DISTANCES LEVELS ROOM EQ DISTANCES OUTPUT LEVELS PLACE MICROPHONES AROUND PREFERRED LISTENING POSITIONS AUTO SPEAKER SETUP CAUTION HIGH AUDIO LEVELS YOU WILL HAVE 10 SEC TO LEAVE THE ROOM OR SIT QUIETLY PRESS gt TO BEGIN COUNTDOWN Configuring the MC 12 for V4 EQ AUTO SPEAKER SETUP TEST WILL BEGIN IN 10 PRESS gt TO SKIP COUNTDOWN
44. tic calibration was performed Eliminate extraneous noises in the listening room including conversations air conditioners and sounds that filter in through open doors and windows Remove objects including people blocking the line of sight path between the microphones and the loudspeakers Configuring the MC 12 for V4 EQ DURING automatic calibration Calibrate the listening room s bass response BEFORE calibrating loudspeaker output levels Room correction applied to the loudspeakers as a result of the EQ DISTANCES LEVELS or ROOM EQ procedure can affect loudspeaker output levels particularly those of the subwoofer and low frequency effect LFE subwoofer The MC 12 outputs calibration noise signals between 55 and 95dB starting at 55dB and increasing in 5dB increments until the microphones detect the required level If calibration noise signals become too loud press the arrow button to cancel automatic calibration Refer to the on screen display rather than the front panel display The on screen display provides additional information and instructions 2 3 Configuring the MC 12 for V4 EQ Lexicon MC 12 Controller Procedure CHECK MICROPHONES EQ DISTANCES LEVELS ROOM EQ DISTANCES OUTPUT LEVELS 2 4 Description Examines the microphones connected to the rear panel microphone input connectors V Confirms that the microphones are properly connected and functioning 7 Calculates an average microp
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