Toa M-864D User manual

DIGITAL STEREO MIXER M-864D
DIGITAL
STEREO
MIXER
M-864D
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
1
1
10
9
8
7
6
5
4
3
2
2
10
9
8
7
6
5
4
3
2
3
10
9
8
7
6
5
4
3
2
4
10
9
8
7
6
5
4
3
2
5
10
9
8
7
6
5
4
3
2
6
10
9
8
7
6
5
4
3
2
I N P U T O U T P U T
7
10
9
8
7
6
5
4
3
2
8
10
9
8
7
6
5
4
3
2
ST
1
10
9
8
7
6
5
4
3
2
ST
2
10
9
8
7
6
5
4
3
2
1
10
9
8
7
6
5
4
3
2
2341 2 341 2 341 2 341 2 341 2 3412341 2 34
1/ST
234
1/ST
234
ASSIGN
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
ASSIGN
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
ASSIGN
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
ASSIGN
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
ASSIGN
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
ASSIGN
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
ASSIGN
PEAK
0dB
-40dB
LOWCUT
FBS
TONE/GAIN
ASSIGN
PEAK
+12
+6
-
6
-
12
-
24
-
40
dB
0
2
10
9
8
7
6
5
4
3
2
PEAK
+12
+6
-
6
-
12
-
24
-
40
dB
0
3
10
9
8
7
6
5
4
3
2
PEAK
+12
+6
-
6
-
12
-
24
-
40
dB
0
4
10
9
8
7
6
5
4
3
2
PEAK
+12
+6
-
6
-
12
-
24
-
40
dB
0
PEAK
0dB
-40dB
MONO
TONE/TRIM
ASSIGN
LR
PEAK
0dB
-40dB
MONO
TONE/TRIM
ASSIGN
LR
ST2
INPUT
ARC
REC OUT
BASS
GAIN
VOL
MID
PAD
VOL
REBLE
RUN
LOCK
REMOTE
LOCAL
ON
POWER
OFF
PHANTOM
VOL
34
2
PRESET
1
Thank you for purchasing TOA’s Digital Stereo Mixer.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
OPERATING INSTRUCTIONS

2
TABLE OF CONTENTS
1. IMPORTANT SAFETY INSTRUCTIONS ........................................... 4
2. SAFETY PRECAUTIONS ............................................................................. 5
3. GENERAL DESCRIPTION .......................................................................... 7
4. FEATURES ............................................................................................................ 7
5. HANDLING PRECAUTIONS ...................................................................... 7
6. INSTALLATION PRECAUTIONS ............................................................. 7
7. NOMENCLATURE AND FUNCTIONS ................................................. 8
Front ............................................................................................................................. 8
Rear terminal section ................................................................................................. 12
8. SYSTEM CONFIGURATION EXAMPLE ........................................... 13
9. ASSIGNMENT SETTINGS ........................................................................ 15
9.1. Assignment Switches of Inputs 1 through 8 ........................................................ 15
9.2. Assignment Switches of INPUTs ST1 and ST2 .................................................. 16
10. PHANTOM POWER, PAD, AND GAIN SETTINGS ................. 17
10.1. Setting Procedures ............................................................................................ 17
10.2. Setting Methods ................................................................................................ 18
11. TRIM CONTROL ............................................................................................ 20
12. TONE CONTROL .......................................................................................... 21
13. LOW CUT FILTER SETTING ................................................................. 22
13.1. What is a Low Cut Filter? ................................................................................... 23
13.2. Low Cut Filter Setting ........................................................................................ 23
14. USING THE SUMMING OUTPUT ....................................................... 24
15. VOLUME LEVEL ADJUSTMENT ....................................................... 25
15.1. Adjusting Input and Output Volume Levels ........................................................ 25
16. ADJUSTING THE RECORDING OUTPUT (REC OUT)
VOLUME LEVEL ........................................................................................... 26
17. FBS FUNCTION SETTINGS .................................................................. 28
17.1. What is the Feedback Suppressor Function (FBS)? .......................................... 28
17.2. Enabling the FBS Function ................................................................................ 28
17.3. Disabling the FBS Function ............................................................................... 29
18. ARC FUNCTION SETTING .................................................................... 29
18.1. What is the Automatic Resonance Control (ARC) Function? ............................ 29
18.2. Notes on ARC Function Setting ........................................................................ 29
18.3. Enabling the ARC function ................................................................................ 30

3
18.4. Example of the ARC Function Use to Make Fine Acoustic Adjustment ............ 34
18.5. Confirming the ARC Function Setting Status .................................................... 35
18.6. Disabling the ARC Function .............................................................................. 36
19. AUTOMATIC MUTE SETTING ............................................................. 37
19.1. What is the Automatic Mute Function? .............................................................. 37
19.2. Indicators Status during Automatic Mute Operation ......................................... 37
20. PRESET MEMORY SETTINGS ........................................................... 38
20.1. Preset Memory Settings .................................................................................... 38
20.2. Preset Memory Storing ..................................................................................... 38
20.3. Recalling the Preset Memory ............................................................................ 39
21. SYSTEM LOCK SETTING ....................................................................... 40
21.1. Enabling the System Lock Function .................................................................. 40
21.2. Disabling the System Lock Function ................................................................. 40
22. INSTALLATION ............................................................................................. 41
22.1. Installation Precautions ..................................................................................... 41
22.2. Rack Mounting .................................................................................................. 41
23. CONNECTIONS ............................................................................................ 42
23.1. Connection Example ......................................................................................... 42
23.2. Removable Terminal Plug Connection ............................................................. 43
24. WHEN USING THE ZM REMOTE CONTROLLER .................. 44
24.1. General Description of the ZM Remote Controller ............................................ 44
24.2. Operation .......................................................................................................... 48
24.3. Connection ........................................................................................................ 50
25. BLOCK DIAGRAM ....................................................................................... 54
26. DIMENSIONAL DIAGRAM ..................................................................... 55
27. SPECIFICATIONS ........................................................................................ 56
27.1. M-864D .............................................................................................................. 56
27.2. ZM-9011 ............................................................................................................ 58
27.3. ZM-9012 ............................................................................................................ 59
27.4. ZM-9013 ............................................................................................................ 59
27.5. ZM-9014 ............................................................................................................ 60

4
1. IMPORTANT SAFETY INSTRUCTIONS
• Readtheseinstructions.
• Keeptheseinstructions.
• Heedallwarnings.
• Followallinstructions.
• Donotusethisapparatusnearwater.
• Cleanonlywithdrycloth.
• Donotblockanyventilationopenings.Installinaccordancewiththemanufacture'sinstructions.
• Donotinstallnearanyheatsourcessuchasradiators,heatregisters,stoves,orotherapparatus(including
ampliers)thatproduceheat.
• Donotdefeatthesafetypurposeofthepolarizedorgrounding-typeplug.
 Apolarizedplughastwobladeswithonewiderthantheother.Agroundingtypeplughastwobladesanda
third grounding prong. The wide blade or the third prong are provided for your safety.
 Iftheprovidedplugdoesnottintoyouroutlet,consultanelectricianforreplacementoftheobsoleteoutlet.
• Protectthepowercordfrombeingwalkedonorpinchedparticularlyatplugs,conveniencereceptacles,and
the point where they exit from the apparatus.
• Onlyuseattachments/accessoriesspeciedbythemanufacturer.
• Useonlywiththecart,stand,tripod,bracket,ortablespeciedbythemanufacturer,
orsoldwiththeapparatus.Whenacartisused,usecautionwhenmovingthecart/
apparatus combination to avoid injury from tip-over.
• Unplugthisapparatusduringlightningstormsorwhenunusedforlongperiodsoftime.
• Referallservicingtoqualiedservicepersonnel.Servicingisrequiredwhentheapparatushasbeendamaged
in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into
the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been
dropped.

5
When Installing the Unit
• Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
• Use the unit only with the voltage specified on
the unit. Using a voltage higher than that which is
specified may result in fire or electric shock.
• Do not cut, kink, otherwise damage nor modify
the power supply cord. In addition, avoid using the
power cord in close proximity to heaters, and never
place heavy objects -- including the unit itself -- on
the power cord, as doing so may result in fire or
electric shock.
• Avoid installing or mounting the unit in unstable
locations, such as on a rickety table or a slanted
surface. Doing so may result in the unit falling
downandcausingpersonalinjuryand/orproperty
damage.
• Since the unit is designed for indoor use, do not
install it outdoors. If installed outdoors, the aging of
parts causes the unit to fall off, resulting in personal
injury. Also, when it gets wet with rain, there is a
danger of electric shock.
When the Unit is in Use
• Should the following irregularity be found during
use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and
contact your nearest TOA dealer. Make no further
attempt to operate the unit in this condition as this
may cause fire or electric shock.
· If you detect smoke or a strange smell coming
from the unit.
· If water or any metallic object gets into the unit
· If the unit falls, or the unit case breaks
· If the power supply cord is damaged (exposure of
the core, disconnection, etc.)
· If it is malfunctioning (no tone sounds.)
• Topreventafireorelectricshock,neveropennor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing to
qualified service personnel.
• Do not place cups, bowls, or other containers of
liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire
or electric shock.
• Donotinsertnordropmetallicobjectsorflammable
materialsintheventilationslotsoftheunit'scover
as this may result in fire or electric shock.
• Theapparatusshallbeconnectedtoamainsocket
outlet with a protective earthing connection.
• The socket-outlet shall be installed near the
equipment and the plug shall be easily accessible.
When Installing the Unit
• Never plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock.
•When unplugging the power supply cord, be sure
to grasp the power supply plug; never pull on the
cord itself. Operating the unit with a damaged power
supply cord may cause a fire or electric shock.
2. SAFETY PRECAUTIONS
•Before installation or use, be sure to carefully read all the instructions in this section for correct and safe
operation.
•Besuretofollowalltheprecautionaryinstructionsinthissection,whichcontainimportantwarningsand/or
cautions regarding safety.
•After reading, keep this manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understandthesafetysymbolsandmessagessoyouarethoroughlyawareofthepotentialsafetyhazards.
Indicatesapotentiallyhazardoussituationwhich,ifmishandled,could
result in death or serious personal injury.
Indicatesapotentiallyhazardoussituationwhich,ifmishandled,could
resultinmoderateorminorpersonalinjury,and/orpropertydamage.
WARNING
CAUTION
WARNING
CAUTION

6
• Whenmovingtheunit,besuretoremoveitspower
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure to hold its plug to pull.
• Donotblocktheventilationslotsontheunit’sboth
sides, top panel, and rear side. Doing so may cause
heat to build up inside the unit and result in fire.
Also, periodically clean the ventilation slots of dust.
• Avoidinstallingtheunitinhumidordustylocations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke
or steam as doing otherwise may result in fire or
electric shock.
• Besuretofollowtheinstructionsbelowwhenrack-
mounting the unit. Failure to do so may cause a fire
or personal injury.
· Installtheequipmentrackonastable,hardoor.
Fix it with anchor bolts or take other arrangements
to prevent it from falling down.
· Whenconnectingtheunit'spowercordtoanAC
outlet, use the AC outlet with current capacity
allowable to the unit.
(Every version except the M-864D CU for US)
· The supplied rack-mounting screws can be used
for the TOA equipment rack only. Do not use them
for other racks.
(M-864D CU for US)
· Rack-mounting screws are not supplied with the
unit. Prepare them that are appropriate for the
equipment rack.
· Be sure to complete installation and cable
connections before connecting the unit’s power
plug to the power source. When uninstalling the
unit or disconnecting the unit’s cables, be sure to
disconnect the power plug from the power source
rst.Doingotherwisemayresultinelectricshock.
• LANConnectorcannotconnecttoConnectorwhich
might catch overvoltage.
When the Unit is in Use
• (WhenusingtheZM-9011/9012/9013/9014Remote
Control Panel)
Be sure to use the dedicated AC Adapter or its
equivalent.
Using other AC adapter may cause a fire.
• If dust accumulates on the power supply plug or
in the wall AC outlet, a fire may result. Clean it
periodically. In addition, insert the plug in the wall
outlet securely.
• Switchoffthepower,andunplugthepowersupply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock.
Thelightingashwitharrowheadsymbol,withinanequilateraltriangle,isintendedtoalertthe
usertothepresenceofuninsulated"dangerousvoltage"withintheproduct'senclosurethatmay
beofsufcientmagnitudetoconstituteariskofelectricshocktopersons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence
of important operation and maintenance (servicing) instruction in the literature accompanying the
appliance.

7
3. GENERAL DESCRIPTION
The M-864D is a Digital stereo mixer equipped with digital signal processing functions such as Automatic
Resonance Control function (ARC), Feedback Suppressor function (FBS), Automatic stereo input mute
function*1, Tone controller, and PEQ.
Tone control and gain adjustment can be made through the front panel operation.
Further, each input has a built-in analog gain control circuit.
Itcanbemountedina19-inchEIAcomponentrack(4Usize*2).
*1Auto mute function or Ducker function
*21Usize=44.5mm(standardsize)
4. FEATURES
• A stereo mixer with 22 input channels (8 monaural inputs and 7 stereo inputs) and 6 output channels (4
monaural outputs and 1 stereo recording output).
• Assignableeachinputto6outputchannels(OUTPUTs1–4,RECOUTL/R)individually.
• Adjustableforintelligiblesoundoutput(ARCfunction)byautomaticallycreatingasoundeldcompensation
lter(ARClter).
• Automaticfeedbacksuppressor(FBSfunction).
• Stereoinputsmutedautomaticallybydetectingthemonauralinputsignal(AutomaticMutefunction).
• Monauralinputswithabuilt-inanaloggaincontrolcircuit(0to+60dB).
• Monauralinputscapableofsupplyingphantompower(+24V,10mA).
• Stereoinputswithabuilt-inanalogtrimcontrolcircuit(–∞to0dB).
• Volumeadjustablewith60mm(2.36")faders.
• EachfunctionsettableattheM-864Dusingitsfront-mountedswitchesandfaders.
• AdvancedsettingsusingthesuppliedM-864DPCSoftwareviaLAN.
• DesignedforuseinconjunctionwiththeoptionalRemoteControlPanelsZM-9011,ZM-9012,ZM-9013,and
ZM-9014 (collectively referred to as “ZM Remote controller” in this manual), enabling volume control, channel
ON/OFF,andPresetmemoryrecall.
5. HANDLING PRECAUTIONS
• Thesuppliedpowersupplycordisdesignedforexclusiveusewiththisunit.Neveruseitwithotherequipment.
• Installtheunitinlocationswherethetemperatureisbetween0and+40°C(32and104°F)andthemoisture
is less than 90% (no dew condensation must be formed).
• The M-864D is a precision audio component. To prevent failure, avoid locations where the unit may be
exposed to strong shocks or vibrations.
• Toclean,besuretofirstswitchofftheunit'spower,thenwipewithadrycloth.Whentheunitgetsverydirty,
useaclothdampedinaneutralcleanser.Neverusebenzene,thinner,alcohol,orchemically-treatedcleaning
cloth because such volatile liquids could deform or discolor the unit.
6. INSTALLATION PRECAUTIONS
• BesuretoinstallandconnecttheunitbeforetheconnectiontotheACmainsoutlet.Removetheunit'spower
supply cord from the AC mains outlet when uninstalling or disconnecting the unit.
• Thesocket-outletshallbeinstalledneartheequipmentandtheplugshallbeeasilyaccessible.

8
7. NOMENCLATURE AND FUNCTIONS
[Front]
Section ASection CSection B
• Section A
12 3
4
5
6
78 9
10 11
12 13
14

9
1. Power switch and Power indicator [POWER]
(Green)
Press this switch to turn on the power, and the
indicator lights.
To turn off the power, press this switch again. The
indicator goes off.
2. Preset memory name label attaching space
Afx a label with the printed Preset memory
contents or name.
3. Preset memory key and Preset memory
indicator [PRESET 1 – 4] (Green)
Used to recall the settings stored in the Preset
memory or store the current parameters.
The indicator lights when the Preset memory has
been selected with the key. (See p. 38.)
4. Output name label attaching space
Afxalabelwiththeprintedoutputname.
5. Output volume fader and output level indicators
[OUTPUT 1 – 4] (Green, orange, red)
Adjusts the output volume level.
The volume level increases by moving up the fader,
and decreases by moving it down.
The respective indicator of –40, –24, –12, –6, 0,
+6, +12, or PEAK lights depending on the output
signal level.
Output level indicates the post-fader level value.
Decrease the volume level when the PEAK
indicator remains lit.
6. Control knobs and setting value indicators
(Green, orange)
Adjust the corresponding control when in Tone
control mode, Gain control mode, or Trim control
mode.
To switch to each respective control mode, use
the Tone/Gain selection switch (18) or Tone/Trim
selection switch (25). (See p. 17 and p. 20.)
Also, adjust the recording output volume level.
(See p. 26.)
The setting value indicators differ in lighting and
ashingstatusdependingonthecontrolmode.For
details, read the description of each function.
7. Tone control mode indicator
[BASS, MID, TREBLE] (Green)
Lights while in Tone control mode.
8. Gain control mode indicator
[VOL, PAD, PHANTOM] (Orange)
Lights while in Gain control mode.
9. Trim control mode indicator [VOL, VOL, VOL]
(Orange)
Lights while in Trim control mode or when the
Recording output switch (31) is pressed.
10. Operation status indicator [RUN]
(Green, orange, red)
Indicates the M-864D’s operation status.
Lights green: Normal operation status
Flashes orange: Built-in fan failure
Flashes red: Malfunction of Digital signal
processing (DSP)
Unlit: CPU failure
11. System lock key and System lock indicator
[LOCK] (Orange)
Press this key when wishing to prohibit the
M-864D’s front panel operation. (See p. 40.)
The indicator lights when the key is pressed.
Set the operations to be prohibited using the
supplied M-864D PC Software.
The M-864D is allowed to prohibit all the target
functions by the factory default.
12. Remote control indicator [REMOTE] (Green)
Lights green during operation by a PC, ZM
Remote controller, and external control device.
13. Local indicator [LOCAL] (Green)
Lights green when the M-864D’s front panel
operation is available.
14. Mounting bracket
Allows to mount the M-864D in an EIA component
rack.

10
17
18
19
20
21
22
15
16
15. Input level indicators [–40 dB, 0 dB, PEAK]
(Green, red)
Light green depending on the input signal level.
(Peak indicator lights red.)
Input level indicates the pre-fader level value.
Adjust the input gain when the PEAK indicator
remains lit. (See p. 17, "PHANTOM POWER,
PAD, AND GAIN SETTINGS.")
16. Low cut switch and Low cut indicator
[LOW CUT] (Green)
The indicator lights when the switch is pressed
andtheinternallowcutlterisenabled.
Cutofffrequency:100Hz*
* Itcanbeadjustedintherangeof20Hzto20
kHz using the supplied M-864D PC Software.
(See the M-864D Software instructions.)
17. Feedback Suppressor switch and Feedback
suppressor indicator [FBS] (Green)
The Feedback Suppression function is enabled
when this switch is pressed, and the indicator
lights. (See p. 28.)
18. Tone/Gain selection switch and Tone/Gain
control mode indicator [TONE/GAIN] (Green,
orange)
Each time the switch is pressed, the mode
switches among Standby mode, Tone control
mode, and Gain control mode.
The indicator goes off in Standby mode, lights
green in Tone control mode, and lights orange in
Gain control mode.
19. Assignment switches and Assignment
indicators [ASSIGN 1 – 4] (Green)
Used to select the output destination of the post-
fader signals adjusted by the monaural input
volume fader (22) of each channel.
The corresponding indicator lights when the
switch is pressed, and the monaural input (1
through 8) signal is output to the corresponding
bus (1 through 4).
20. Protective cover (accessory)
Used to protect settings such as Low cut switch
(16) and Assignment switch (19) settings.
21. Input name label attaching space
Afxthelabelwiththeprintedinputname.
22. Monaural input volume fader [INPUT 1 – 8]
Adjusts the monaural input volume level.
The volume level increases by moving up the
fader, and decreases by moving it down.
• Section B

11
• Section C
25
26
27
28
29
23
24
22
30
31
23. Input level indicators [–40 dB, 0 dB, PEAK]
(Green, red)
Light green depending on the input signal level.
(The peak indicator lights red.) Input level indicates
the pre-fader level value.
Adjust the trim control when the PEAK indicator
remains lit. (See p. 20, "TRIM CONTROL.")
The ST1 L channel’s input level indicator shows
the total level of 3 inputs (A, B, and C) provided at
the STEREO INPUT 1 L channel.
Likewise, the ST1 R channel’s input level indicator
shows the total level of 3 inputs (A, B, and C)
provided at the R channel.
The ST2 L channel and the ST2 R channel indicate
the levels in the same way.
24. Monaural summing switch and Monaural
summing indicator [MONO] (Green)
The indicator lights when the switch is pressed,
and stereo input signals applied to L and R
channels can be mixed and output (monaural).
(See p. 24.)
25. Tone/Trim selection switch and Tone/Trim
control mode indicator [TONE/TRIM]
(Green, orange)
Each time the switch is pressed, the mode
switches among Standby mode, Tone control
mode, and Gain control mode.
The indicator goes off in Standby mode, lights
green in Tone control mode, and lights orange in
Trim control mode.
26. Assignment switches (Stereo) and Assignment
indicators [1 – 4] (Green)
Used to select the output destination of the post-
fader signals adjusted using the stereo input
volume fader (28) of each channel.
The corresponding indicator lights when the switch
is pressed, and the signals applied to the Stereo
input 1 and 2 are output to the corresponding bus
(1 through 4).
1/ST:OutputsLchannelsignalsfromtheOutput1.
2: Outputs R channel signals from the Output 2.
3: Outputs L + R channels signals from the
Output 3.
4: Outputs L + R channels signals from the
Output 4.
Note
With the switch “1/ST” or “2” pressed, pressing
the Monaural summing switch (24) causes the
input signals to be mixed and sent as summing
output, outputting the L + R channels signals to
the Output 1 and 2 individually.
27. Input name label attaching space
Afxthelabelwiththeprintedinputname.
28. Stereo input volume fader [ST 1 – 2]
Adjusts the stereo input volume level.
The volume level increases by moving up the
fader and decreases by moving it down.

12
29. Front-mounted Stereo input 2 jack [ST 2 IN]
–10dB*,10kΩ,unbalancedtype,stereominijack.
It is internally connected in parallel to the Stereo
input 2. Adjust the input level with the Stereo 2
Input volume fader (28).
30. ARC switch and ARC operation indicator
[ARC] (Green)
Press this switch to enable the Automatic
Resonance Control function (ARC).
Hold down this switch for 3 seconds to start
the ARC measurement, and the ARC operation
indicatorashes.
Uponmeasurementcompletion,theARClteris
set, and the ARC indicator lights. (See p. 29.)
31. Recording output switch and Recording
output indicator [REC OUT] (Green)
The indicator lights when the switch is pressed,
and the Control knob (6) is allowed to adjust the
recording output volume. (See p. 26.)
*0dB=0.775V
[Rear terminal section]
32 33 34 35 36 3637 38 38 39 39 40
41 42 43 44
32. AC inlet
Connect this inlet to the AC wall outlet using the
supplied dedicated power cord.
33. Output terminals [OUTPUT 1 – 4]
+4dB*,600Ω,balancedtype,removableterminal
block.
The input channel signals assigned to Buses
1 through 4 using the Assignment switches (19
and 26) are output from each individual output
terminal.
Buses 1 through 4 correspond to the output
terminals 1 through 4, respectively.
34. Contact output terminals [OUTPUT C, 1, 2, 3,
4, 5, 6, 7, 8, C]
Removable terminal block, 8-channel contact
output terminal.
Perform function assignment to each contact by a
PC using the supplied M-864D PC Software.
35. Contact input terminals [INPUT C, 1, 2, 3, 4, 5,
6, 7, 8, C]
Removable terminal block, 8-channel contact
input terminals.
Perform function assignment to each contact by a
PC using the supplied M-864D PC Software.
36. AC adapter input [LINK A and LINK B]
Connect the dedicated AC adapter or its
equivalent* that supplies 24 V DC power to the
ZM Remote controller.
* Use the AD-246 AC adapter (optional) or its
equivalent. As for the usable adapter, consult
your TOA dealer.
37. Termination switch [TERMINATION ON, OFF]
UsedtoturnONorOFFtheterminationof120Ω
for parallel connection.
38. Data line connection terminals [D+, D–]
Connect the data line from the ZM Remote
controller to these terminals.
Match the polarity.
39. 24 V DC output terminals [DC 24 V, + and –]
Supply 24 V DC to the ZM Remote controller.
40. LAN port
Connect this port to the LAN-connected switching
hub using a LAN cable.
The MX-864D’s default IP address is “192.168.14.1.”
Perform settings by a PC using the supplied
M-864D PC Software.
• Link indicator
Lights when the link is established and during
data transmission or reception.
• Full indicator
Lights during Full duplex operation.
41. Functional ground terminal
Connect this terminal to the functional ground of
external equipment if much noise is encountered
when the digital audio processor is connected
to the external equipment. The noise may be
reduced
Note: This ground is not for protective ground.

13
8. SYSTEM CONFIGURATION EXAMPLE
The M-864D can be used alone or in conjunction with a PC and external control device.
• UsingtheM-864DunitinconjunctionwithaPC
PC
M-864D
Switching hub
•UsingtheM-864DunitinconjunctionwiththeZMRemotecontroller
• UsingtheM-864Dunitinconjunctionwiththeexternalcontroldevice
M-864D
External control device
M-864D
ZM Remote controller
42. Recording output terminals [REC OUT L, R]
–10dB*,1kΩ,unbalancedtype,RCAjack.
Mixed signal of Buses 1 through 4 selected by the
supplied M-864D PC Software is output.
43. Stereo input terminals [STEREO INPUT 1, 2,
A, B, C]
–10dB*,10kΩ,unbalancedtype,RCAjack.(See
p.54,"BLOCKDIAGRAM.")
44. Monaural input terminals
[MONO INPUT 1 – 8, E, C, H]
–56to+4dB*,10kΩ(PADON)/7kΩ(PADOFF),
balanced type, removable terminal block.
Input sensitivity can be selected by the Control
knobs (6) when the control mode is the Gain
control mode.
*0dB=0.775V

14
• UsingtheM-864DinconjunctionwiththeexternalcontroldeviceviaLAN(Ethernet)
• UsingmultipleM-864Dunits(upto5M-864Dunits)
In this event, Preset memory switching interlocks among up to 5 M-864D units.
• UsingmultipleM-864Dunits(upto5units)inconjunctionwiththeexternalcontroldeviceandZMRemote
controller to be directly connected, and a PC and external device via LAN.
M-864D
Switching hub
External control device
M-864D
Switching hub
M-864D
Switching hub
ZM Remote
controller PC
External control device
External control device
Note
Only a single M-864D can
be controlled from a PC.

15
9. ASSIGNMENT SETTINGS
It is possible to assign each input to 4 output channels (OUTPUT 1, 2, 3, and 4).
INPUTs 1 – 8 INPUTs ST 1 and 2
Assignment switch
Assignment indicator
M-864D
Assignment switch
Assignment indicator
9.1. Assignment Switches of Inputs 1 through 8
It is possible to assign each monaural input to Outputs 1 through 4.
Pressing the Assignment switch 1 causes the corresponding indicator to light, routing the input signal to the
OUTPUT 1. The Assignment switches 2 through 4 serve as the same function as the Assignment switch 1.
Assignment switch Output destination
1OUTPUT 1
2OUTPUT 2
3OUTPUT 3
4OUTPUT 4
[Assignment setting example]
Set the Assignment switches of the inputs as the table below.
Input Assignment switch
MONO INPUT 1 1, 2
MONO INPUT 2 2, 3
MONO INPUT 3 1
MONO INPUT 1 MONO INPUT 2 MONO INPUT 3 : Unlit
: Lit
Assignment switch
Assignment indicator
Note
Use a ne-tipped object to
press in the Assignment switch.

16
Thegurebelowshowsasignalow.
9.2. Assignment Switches of INPUTs ST1 and ST2
It is possible to assign Stereo inputs 1 and 2 to Outputs 1 through 4.
Pressing each Assignment switch causes the corresponding indicator to light, routing the input signal as shown
in the table below.
Assignment switch Output destination Signal
1OUTPUT 1 L channel
2OUTPUT 2 R channel
3OUTPUT 3 L+Rchannel
4OUTPUT 4
[Assignment setting example]
Set the Assignment switches of the inputs as the table below.
Input Assignment switch
STEREO INPUT 1 1, 2, 4
STEREO INPUT 2 1, 2, 3
STEREO INPUT 1 STEREO INPUT 2 : Unlit
: Lit
Assignment switch
Assignment indicator
Note
Use a ne-tipped object to
press in the Assignment switch.
Assignment switch
Input
MONO INPUT 1
MONO INPUT 2
MONO INPUT 3
OUTPUT 1
(Outputs the mixed signal of MONO INPUTs 1 and 3)
OUTPUT 2
(Outputs the mixed signal of MONO INPUTs 1 and 2)
REC OUT R*
(Outputs the mixed signal of MONO INPUTs 1 and 2)
REC OUT L*
(Outputs the mixed signal of MONO INPUTs 1 and 3)
OUTPUT 3 (Outputs the MONO INPUT 2 signal)
OUTPUT 4 (No signal)
1234
Set the REC OUT assignment using the supplied M-864D PC Software.
The REC OUT default assignment is as follows.
REC OUT L: Assignment switch 1
REC OUT R: Assignment switch 2
*

17
Thegurebelowshowsasignalow.
Assignment switch
Input
STEREO INPUT 1 L
R
L
R
STEREO INPUT 2
OUTPUT 1
(Outputs the mixed L signal of STEREO INPUTs 1 and 2)
OUTPUT 2
(Outputs the mixed R signal of STEREO INPUTs 1 and 2)
REC OUT R*
(Outputs the mixed R signal of STEREO INPUTs 1 and 2))
REC OUT L*
(Outputs the mixed L signal of STEREO INPUTs 1 and 2)
OUTPUT 3
(Outputs the mixed L+R signals of STEREO INPUT 2)
OUTPUT 4
(Outputs the mixed L+R signals of STEREO INPUT 1)
1234
Set the REC OUT assignment using the supplied M-864D PC Software.
The REC OUT default assignment is as follows.
REC OUT L: Assignment switch 1
REC OUT R: Assignment switch 2
*
10. PHANTOM POWER, PAD, AND GAIN SETTINGS
The input sensitivity and phantom power ON or OFF can be set to Monaural inputs 1 through 8 depending on
the devices to be connected.
Perform these settings by the control knobs after placing the M-864D in Gain control mode.
10.1. Setting Procedures
Step 1. Place the M-864D in Gain control mode.
Step 2. Perform settings as follows depending on the device to be connected. (See the next page.)
Device to be connected Settings
Phantom power PAD
Dynamic microphone OFF OFF
Condenser microphone
(When phantom power is required) ON OFF
Line input device OFF ON
Step 3. Adjust the gain. (See the next page.)

18
10.2. Setting Methods
10.2.1. Placing the M-864D in Gain control mode
PresstheTone/GainselectionswitchofthedesiredmonauralinputchannelseveraltimesuntiltheTone/Gain
control mode indicator lights orange.
The Gain control mode indicator lights orange.
Gain control knob
PAD ON/OFF setting knob
Phantom power ON/OFF
setting knob
M-864D
Tone/Gain control
mode indicator
Press several times.
Tone/Gain
selection switch
Lights orange.
Gain control
mode indicator
Control knobs
Lights orange.
Note
Useane-tippedobjecttopressin
theTone/Gainselectionswitch.
Phantom power ON/OFF
setting knob
10.2.2. Phantom power ON/OFF setting
The phantom power ON or OFF can be set to
Monaural inputs 1 through 8.
Rotating the Phantom power ON/OFF setting
knob clockwise turns the phantom power ON, and
counterclockwise turns it OFF for the channel of
whichTone/Gaincontrolmodeindicatorislighting
orange.
Default setting: OFF
Phantompower: +24V,10mA
When the phantom power is ON, all the setting
value indicators around the control knob light, and
when OFF, they go off.
Note
Turn the phantom power ON only when connecting a microphone which requires phantom power.
With the phantom power ON, connecting the device not requiring phantom power may cause the M-864D and
this connected device to fail.
All indicators go off.
Rotate counterclockwise. Rotate clockwise.
Phantom power OFF
(Default setting)
All indicators light.
Phantom power ON

19
10.2.3. PAD ON/OFF setting
The PAD ON or OFF can be set to Monaural inputs
1 through 8.
When the input level is high, turn on the PAD.
The attenuation circuit of the input level is activated
by turning on the PAD, eliminating the input clip.
Rotating the PAD ON/OFF setting knob clockwise
turns the PAD ON, and counterclockwise turns it OFF
for the channel of which Tone/Gain control mode
indicator is lighting orange. (Default setting: ON)
When the PAD is ON, all the setting value indicators
around the control knob light, and when OFF, they
go off.
10.2.4. Adjusting the Gain
It is possible to adjust gains of the Monaural inputs
1 through 8.
Rotating the Gain control knob clockwise amplies
the gain of the channelofwhich Tone/Gain control
mode indicator is lighting orange.
(For the default value and setting range, refer to the
next page.)
Default value When PAD set to ON: 0 dB
When PAD set to OFF: +15dB
Setting range
When PAD set to ON: 0to+18dB
in 1 dB steps
When PAD set to OFF: +15to+60dB
in 1 dB steps
Theguresbelowshowtherelationshipbetweenthesettingvalueindicatorsaroundthecontrolknobandthe
gain.
[When PAD set to ON]
PAD ON/OFF setting knob
All indicators go off.
Rotate Counterclockwise. Rotate clockwise.
PAD OFF
All indicators light.
PAD ON (Default setting)
Gain control knob
1 indicator lights.
0 dB
One scale advances
in 2 dB steps.
One scale advances
in 2 dB steps.
5 indicators light.
+8 dB
All indicators light.
+18 dB
[When PAD set to OFF]
: Lit
: Unlit
1 indicator lights.
+15 dB
1 scale advances
in 5 dB steps.
1 scale advances
in 5 dB steps.
5 indicators light.
+35 dB
All indicators light.
+60 dB

20
11. TRIM CONTROL
It is possible to adjust input levels of the Stereo Inputs 1 and 2.
If the input devices’ output levels are uneven among them, this function serves to align the input levels.
Each of A, B, and C inputs provided at the Stereo inputs 1 and 2 can be individually adjusted.
Step 1. Place the M-864D in Trim control mode.
PressseveraltimestheTone/TrimselectionswitchoftheStereoinputchannelforwhichinputlevelis
tobeadjusteduntiltheTone/Trimcontrolmodeindicatorlightsorange.
The Trim control mode indicator lights orange.
Tone/Trim
selection switch
M-864D
Tone/Trim control
mode indicator Trim control
mode indicator
Control knobs
Press several times.
Lights orange.
1
2
Lights orange.
Note: Useane-tippedobjecttopressintheTone/Trimselectionswitch.
Step 2. Adjust the gains by rotating each control knob.
A(L/R)inputofthestereoinput:Rotatetheleftknob.
B(L/R)inputofthestereoinput:Rotatethecenterknob.
C(L/R)inputofthestereoinput:Rotatetherightknob.
ThegainofthechannelofwhichTone/Trimcontrolmodeindicatorislightingorangecanbeadjusted.
Default value –18dB
Adjustment range –∞,–54to0dBin1dBsteps
A inputC input
B input
Control knob of A
(L/R) input
Control knob of B
(L/R) input
Control knob of C
(L/R) input
A inputC input
B input
Stereo input 2 terminal Stereo input 1 terminal
M-864D Rear